JPH07255361A - Sausage casing and formation of coated film on inner surface of said casing - Google Patents

Abstract

PURPOSE: To provide a sausage casing, which can transfer a color onto sausage while processing the sausage and is improved in a deeply reddish color and appearance, having internal coating, which seems uniform for naked eyes, composed of a water-soluble anatto colorant and oil materials. CONSTITUTION: This sausage casing has a water-soluble anatto colorant (A), two components (B) of one or plural oil bixin solutions and oil materials such as oil bixin disperse liquid or oil bixin emulsion and further preferably, internal coating (C), which is uniform for naked eyes, composed of an emulsifier such as lecithin. In this case, this casing is formed from cellulose and it is preferable that the colored sausage is produced by filling this casing with meat.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cellulose casing having an inner surface coated with a coloring agent used in the production of exposed sausage, and more specifically, to transfer color to a sausage packed inside the casing. And a method for forming a coating film on the inner surface of the casing.

[0002]

BACKGROUND OF THE INVENTION Sausages are obtained by filling a casing with meat emulsion and then cooking and smoking it occasionally.

Some sausages are inserted into a regenerated cellulose casing and processed inside the casing. After emulsion processing of the casing, the casing is generally peeled and the exposed sausage is packaged and sold to the consumer.

Sausage manufacturers need to pay attention to the appearance of sausages to attract consumers. Color is an important feature of all appearance elements. The color of sausage is used depending on the meat emulsion. The color also depends on the processing conditions, for example, whether or not smoke treatment is performed.

It is desirable that the sausage be colored substantially uniformly over the surface. As a way to solve this problem, sausage manufacturers sometimes use food coloring,
In particular, the outer surface of the sausage was colored in a colored storage container containing annatto.

There are other methods for coloring sausage in a coloring bath, but these methods have caused various problems for food manufacturers. One of the problems is the reservoir
It requires a suitable coloring device, including a conveyor belt, a coloring and especially a washing solution.

Further, as the coloring agent contained in the bathtub is gradually consumed, the sausage becomes unevenly colored, and in order to solve this problem, the gradually consumed coloring agent solution must be replaced. That is.

Further, after the sausage is colored, it is generally fixed or washed. The colorant is consumed and the colorant is wasted in such a wash bath, and the waste from such a color bath would lead to environmental pollution problems.

Furthermore, increasing the time the exposed sausage is exposed to the external environment increases the risk of microbial contamination of the sausage.

The cellulose casing used in the production of sausage is produced by extruding a viscose spinning solution through a circular hole. The tubes produced in this way are solidified in various baths, washed, and finally macerated with a plasticizer and dried. Further, a fiber net is embedded in the wall portion of the cellulose casing. This fiber network is generally made using rope paper to reinforce the casing. Such casings are known as fiber casings.

The cellulose casing is soaked in various edible colorants to transfer the colorant to the surface of the sausage while processing the sausage, thus the surface of the sausage when the casing is removed. Is colored. F. D. & C. (Food, Drug, Cosmetics Act)
Red number 40 and F.I. D. & C. Yellow number 6 is an artificial colorant used to transfer color to sausages packed inside the casing.

The casing can be colored in a coloring bath or by forming an internal coating on the inside of the casing.

The casing can be colored in the bath by passing the casing through a coloring bath which is usually in a gel state to soften the coloring agent in the casing. An example of this method is disclosed in Thor US Pat. No. 2,521,101.

On the other hand, various methods are known in which various substances are added for various purposes to form a coating film on the inner surface of a sausage casing. Above all, Bridgeford (Br
idgeford) US Pat. No. 3,451,827, such as spraying or maceration on the inner surface of the casing during the folding operation, Shiner et al. US Pat. No. 3,378,379 and Firth.
There is a method for forming a foamed coating film described in US Pat. No. 3,106,471 of h). According to this method for forming a foamed coating film, the coating liquid is placed inside the casing, and is held by the action of the roller that presses the casing so that the coating liquid does not flow out from the casing while moving the casing forward. . When the roller acts, a desired coating liquid is passed through the inside of the casing to form a coating film on the inner surface of the casing.

The coating film is generally provided on the inner surface of the casing, but the coating film may be provided on the outer surface of the casing so that the inner surface of the casing is turned upside down before the meat is packed in the casing.

Annatto is an edible colorant used in some countries for coloring the surface of sausages because it has a very attractive reddish tinge. There are various Annatto extracts on the market with different properties. There are water-soluble annatto colorants containing norbixin as the main coloring substance, and other oil-soluble colorants containing bixin as the main coloring substance. These colored extracts can be varied and the content of bixin and norbixin determined by spectroscopic analysis, the colorant being indicated by the equivalent content of norbixin.

As stated above, annatto can be used to color the outer surface of sausages and can be passed through the sausage casing in an annatto bath as disclosed, for example, in US Pat. No. 2,521,101 to Thor et al. Can be used to color the casing.

It is therefore clear that annatto can be used for coloring sausages and casings in baths. Nonetheless, attempts to produce a cellulosic casing that cooperates with annatto colorant and transfer color to the sausage have failed. The reason is that, at present, no sausage cellulose casing capable of transferring annatto is commercially available, and various difficulties are inevitably involved in their production. These difficulties are summarized as follows: -Anatto that has been macerated in a gelled state is difficult to remove from the casing, only a small amount of annatto colorant is transferred to the sausage; The colorant must diffuse inside and pass through the casing at a relatively high velocity in the bath, which makes it difficult to achieve the desired high concentration of annatto in the casing; Unable to withstand relatively high temperatures close to 60 ° C, no noticeable damage, and difficult to maintain the bath in regular manufacturing and processing conditions; -Available for drying casings in dryers High temperature is required, which impairs the stability of Anatto.

In addition to these technical difficulties, the water-soluble and oil-soluble annatto extracts available in commercial products are limited in what can be used individually as colorants, and a coating film suitable for the properties of the cellulose casing must be used. Cannot be formed.

In practice, because the cellulose casing is substantially hydrophilic, the oily annatto solution remains in drops on the surface of the casing and is unable to wet it, and thus a homogeneously colored coating. Instead of forming a film, a spotted pattern is applied on the surface of the sausage.

Furthermore, when an aqueous annatto solution is used,
The casing is unevenly colored. These aqueous annatto solutions impart tackiness to both sides of the casing and when the casing is opened, the colorant remains on only one side, thus only one half of the casing is colored and the other half is not colored. , So the sausage is unacceptable and unevenly colored.

Cellulose casings are generally folded and sold in the form of small cylinders (rods) containing a folded casing of at least 50 m. In addition, the oily coating reduces the stickiness between the folds of the casing produced during the folding process, and thus the improper cellulose cylinder folding cylinder that does not retain its shape after folding the casing. The body will be manufactured.

Therefore, there is a great need for a cellulose casing which is capable of transferring the annatto colorant to the sausage packed inside the cellulose casing. This type of casing has the following particular advantages: -Annatto sausages, as are the food colorings commonly used to transfer colorants to sausages inside cellulose casings of this type. It is a coloring agent that remains on the surface and does not migrate to the inside of the sausage. -A large amount of colorant is required to diffuse the colorant into the sausage so that the surface of the sausage has the same color, thus saving colorant. -"Natural" colorants are used and are better accepted by consumers as compared to the "man-made" colorants commonly used for transferable cellulose casings of this kind. -An additional advantage in the coloring of sausages finished in annatto tub is that the contact between the colorant and the sausage surface takes place at a high temperature step, thus the colorant is better anchored to the sausage surface and there is a risk of microbial contamination. Will be reduced. -Another advantage of this casing for food manufacturers is that they no longer require the manufacturer to install a sausage coloring device.

[0024]

OBJECT OF THE INVENTION An object of the present invention is a cellulose casing which transfers a red-orange color to a sausage packed inside the cellulose casing with a substantially uniform appearance, and solves the above-mentioned various problems. It is to provide a cellulose casing containing annatto colorant and having the various advantages described above.

Another object of the present invention is to provide a coating for sausage cellulose casing.

Still another object of the present invention is to provide a method for forming a coating film with a paint on the inner surface of a sausage cellulose casing.

Yet another object of the present invention is to provide a method of fixing the colorant to the casing.

[0028]

DISCLOSURE OF THE INVENTION The present invention is a cellulose casing which transfers color to sausage while processing the sausage, one of which is a water-soluble annatto colorant and the other is
One provides a sausage casing comprising a macroscopically homogeneous internal coating consisting of at least two components with one or more oily substances.

According to the invention, sausage casings, preferably coated with a colorant, are of various lengths, for example 50 m.
It is sold in the form of folding a rod of about 30 cm in length or more.

The sausage casing is used as a molding material for producing sausage by packing the contents. Once sausage processed, the final cooking step,
In most cases, the casing is peeled off and removed from the sausage during the smoking process.

The cellulosic casing applied according to the invention may be provided with a fiber network on its wall or, as mentioned above, by known methods, for example Shiner et al. US Pat. No. 2,999,757. And Matecky U.S. Pat. No. 29839.
It is produced by the method described in No. 49.

As mentioned above, inside the cellulosic casing, a paint containing at least two components, one a water-soluble annatto colorant and the other one or more oil-soluble substances, is added to the sausage Color is added to the surface.
This allows the sausage to have the desired deep reddish color that is popular in the market.

Various annatto having different characteristics are provided according to the market demand. In fact, there are water-soluble annatto colorants, as well as oil-soluble colorants that contain varying amounts of the main pigment substances, bixin and norbixin.
These two types of colorants can easily be converted to other types and the concentration of this type of colorant is roughly:
It is expressed as an equivalent concentration of either one of the above two types.

In the recent market, there are water-soluble annatto colorant solutions containing about 0.2% to 5% of coloring substances expressed as norbixin, or water-soluble powder forms containing up to 15% of coloring substances expressed as norbixin. Colorants are circulating.

In addition, the oil-soluble annatto type colorant may contain from about 0.1% to 5% of the colorant represented as bixin. Colorants of this type are generally oil-soluble, but may be composed of a true solvent, a suspending agent, an emulsion or the like. Such distinction is not an important factor in carrying out the present invention.

The water-soluble or oil-soluble annatto colorant itself in the prior art of the present invention described above is not sufficient to obtain a coating film having suitable properties for the cellulose casing. The oil-soluble annatto colorant does not essentially adapt to the hydroxyl groups and easily disengages from the surface of the cellulose casing,
Therefore, it does not impart sufficient water resistance to the surface of the sausage.

The aqueous solution of annatto adheres to both sides of the casing, and when the casing is opened, the colorant remains only on one side of the casing. Therefore, half of the casing is colored, half of the dust is not colored and the sausage is not fully colored and is unacceptable.

The mixture of water-soluble annatto colorant and oil-soluble annatto colorant is: -prevents easy detachment from the coating surface-is essentially homogeneous-prevents sticking of the casing surface. It is a thing.

Without deviating from the binding theory, a mixture of the above two substances improves the homogeneity of the oil-soluble colourant, further improving its homogeneity than the colourant consisting of a single substance, water-soluble on the cellulose casing. It seems to reduce the excessive stickiness of the colorants.

A cellulose casing for transferring color to the sausage while processing the sausage, further comprising:
A cellulosic casing is provided that comprises a macroscopically homogeneous inner coating consisting of at least two components, one water-soluble annatto colorant and another one or more oily substances.

The colorant component expressed as norbixin is 0.2-9 mg / d per unit area of the casing.
m ² , preferably 1 to 2.5 mg / dm ² .

The content of the oily substance in the coating film on the inner surface of the casing is 1 to 25 mg / d per unit area of the inner surface of the casing.
m ² , preferably 3 to 15 mg / dm ² . The reference surface of the casing is the inner surface of the casing.

Other oily complex substances added, for example:
Animal oils, vegetable oils, mineral oils, synthetic oils, glycerides, and the like have similar effects, and as described above, these compound substances can replace the oily annatto solvent. Therefore, the inner coating of the casing does not necessarily have to include an oily annatto solvent, and instead such oily composite materials or mixtures of two or more thereof may be used. The mixture may optionally include an oily annatto solution.

The concentration of the oily substance component is 0.5% of the coating film weight.
-25%, preferably 3-15%.

In a preferred embodiment, the oily substance component of the coating comprises an oily bixin solution, an oily bixin dispersion, which comprises 0.1% to 5% of the total weight of the coating by a coloring agent expressed as bixin. Alternatively, it is an oily bixin emulsion. Water-soluble annatto colorants are commercially available, for example, A-5000-WS-P (CHR. Hansen (Ha
nsen) company) can be used. Oil-soluble colorants are commercially available, eg A-4000-OSS.
(CHR. Hansen) or commercial products with similar properties can be used.

The content of the coloring agent can be changed according to the color tone to be obtained in the sausage, and the coloring color tone of the finish depends on the meat emulsion used and the processing method thereof.

The content of the coloring agent expressed as norbixin is 0.2-9 mg / unit area of the inner surface of the casing.
dm ² , preferably 1 to 2.5 mg / dm ² .

In addition, various additives are optionally added to the colored coating liquid. As these additives, for example,
Diluents such as water and edible oils; for example, polyol plasticizers such as glycerin and propylene glycol; for example,
Emulsifiers such as lecithin, ethylene oxide adducts, partial fatty acid esters, polysorbates, and Tween 80; for example, there are cellulose ethers such as carboxymethyl cellulose and the like, which are peeling agents or peeling accelerators, and these additives are usually used in the production of sausage. It can be used in addition to the additives used.

The present invention provides a suitable composite material that forms a coating on the inside surface of a sausage cellulose casing. The composite material comprises at least two of one water-soluble annatto colorant and one or more oily materials.
The coating liquid has a water-soluble annatto colorant concentration of 0.2% to 10% and an oily substance concentration of 0.5% to 25%, preferably 3% to 15%. .

The water-soluble annatto colorant is, for example, A-4.
A commercially available product such as 000-WS-P (manufactured by CHR. Hansen) can be used.

The other substance component of the above coating liquid is composed of one or more oily substances. This oily substance
For example, it is possible to use an oily solution of A-4000-OSS (manufactured by CHR. Hansen) or a commercially available product having similar properties as a commercially available oily annatto colorant dispersed or emulsified. Other oily complex substances, for example, animal oil, vegetable oil, mineral oil, silicone oil, synthetic oil, glyceride, etc. can be added, and these oily substances are preferably oily annatto solution as appropriate as two of the oily complex substances. The oily annatto solution can be prepared with or without replacement with a mixture of more.

Further optionally, the coating composite material is supplemented with various additives commonly used in the production of sausages, such as, for example, diluents, plasticizers, emulsifiers, debarking or debarking accelerators or mixtures. In addition, other usual additives can be added.

The present invention also provides a method for forming a coating film on the inner surface of a sausage cellulose casing with a paint. The method of forming a coating film on the inner surface of the cellulose casing comprises a step of bringing the inner surface of the casing into contact with a coating liquid or a composite substance containing at least a water-soluble annatto colorant component and an oily substance component consisting of one or more oily substances. The concentration of the water-soluble annat colorant in the coating liquid is 0.2% to 10%, and the concentration of the oily substance is 0.5% to 25%, preferably 3% to 15%.

The water-soluble annatto colorant which is one component of the above-mentioned coating liquid is, for example, A-4000-WS-P (CH
R. Commercially available products such as Hansen) can be used.

The oily substance, which is another component of the coating liquid, is composed of one or more oily substances. This oily substance is an oil-soluble annatto colorant, for example A-400.
0-OSS (manufactured by CHR. Hansen) or commercial products of oily dispersions or emulsions of commercial products having similar properties can be used. Other oily complex substances, such as animal oils, vegetable oils, mineral oils, silicone oils, synthetic oils, glycerides, etc. can be added, these oily complex substances preferably being a mixture of two or more oily annatto solutions. With or without replacement,
An oily annatto solution can be obtained.

In a preferred embodiment, the oily substance component of the coating liquid is an oily bixin solution, an oily bixin dispersion, or an oily bixin emulsion.

Further optionally, the coating liquor comprises various additives commonly used in the production of sausages, for example:
Diluent, plasticizer (5% to 60% of the total weight of the coating liquid),
Emulsifiers, dehulling or dehulling accelerators or mixtures, and other customary additives can be included.

Various methods for maceration the inner surface of sausage casings, notably Firth
U.S. Pat. No. 3,106,471 or Bridgford U.S. Pat. No. 3,451,827.
The method disclosed in the publication can be used. However, the utility of the present invention is not limited to those US patents.

Furthermore, the present invention is intended to produce a colored sausage casing using a cellulose casing, and according to the present invention, a color is transferred to the sausage while processing the sausage, one of which is water-soluble. A sausage casing is provided which comprises a macroscopically homogeneous inner coating consisting of at least two components, a polar annatto colorant and another one or more oily substances.

Furthermore, the present invention is to provide a method for producing a colored sausage obtained by packing meat inside the cellulose casing obtained by the present invention, wherein the colored cellulose casing is a sausage A macroscopically homogeneous internal coating that transfers color to the sausage while processing is performed and that consists of at least two components, one a water-soluble annatto colorant and the other one or more oily substances. including.

[0061]

The following examples serve to illustrate the invention and are not intended to be limiting.

Example 1 This example provides a casing adapted to treat the casing with an annat-colorant mixture to transfer a substantially even red-orange color to the foodstuffs packed in the casing.

The amounts of the components of the following composition were mixed and dispersed using a high power mixer: Composition A-4000-OSS 10 ml AN-14 WP 21.4 g Polyethylene glycol 25 ml Glycerin 20 ml Tween 80 1.62 g Carboxy. Methylcellulose (Natrium salt) (alocel) 0.64 g Water 45 mg

A-4000-OSS is an oil-soluble Annatto colorant containing about 4% colorant, CHR. It is a product of the Hansen company.

AN-14 WP is a water soluble powdered annatto colorant containing about 14% colorant and is a product of the Xantoflor company.

Tween 80 is a sorbitan polyoxyethylene fatty acid ester.

The mixture is uniformly (slowly and consistently and firmly) formed by the so-called foaming method on the inner surface of the cellulose casing, uniformly coated with 0.04 ml / dm ^{2 of} the colorant per unit area, that is, 1.1 mg / dm ^2. Applied.

The water content of the casing was adjusted to 14%, the casing was folded, the casing was filled with meat, and then the sausage was processed and peeled.

The sausage obtained is substantially homogeneous in red-
It was colored orange.

Example 2 This example uses a water-soluble form of annatto colorant and is a non-uniformly colored sausage.

The amounts of the components of the following composition were mixed and dispersed using a high power mixer: Composition AN-14 WP 28.6 g Propylene glycol 15 ml Glycerin 9 ml Carboxymethylcellulose (Naturium salt) (Walocel) 0.64 g Water 76 mg

The above mixture was applied to the inner surface of the cellulose casing by the foaming method at 0.04 ml / d per unit area.
A colorant corresponding to m ² , ie 1.1 mg / dm ² , was applied uniformly.

The water content of the casing was adjusted to 14%, the casing was folded, the meat emulsion was packed in the casing, and then the sausage was processed and peeled. The casing was difficult to fold due to its self-adhesiveness.

The obtained sausage was covered with an irregular mottled pattern (mosaic).

Example 3 This example is an example in which the oil-soluble annatto colorant was used and the sausage was not colored.

The amounts of the components of the following composition were mixed and dispersed using a high power mixer: Composition A-4000-OSS 10 ml Propylene glycol 25 ml Glycerin 20 ml Lecithin 1.8 g Carboxymethylcellulose (Naturium salt) (Walocel) 0.64 g water 45 mg

The above mixture was applied to the inner surface of the cellulose casing by the foaming method at 0.025 ml / dm 3 per unit area.
A colorant corresponding to ² , ie 0.1 mg / dm ² , was applied uniformly.

The water content of the casing was adjusted to 14%, after folding the casing, the casing was packed with a meat emulsion and then the sausage was processed and peeled.

The sausage obtained had a speckled pattern and was colored a non-uniform reddish pearl which was easily removed by the epidermis.

Example 4 In this example, a commercially available annatto colorant was used, and the sausage was not colored well.

Amounts of each component of the following composition were mixed and dispersed using a high power mixer: Composition A-720-OWS 98 ml Tween 802 2 ml.

A-720-OWS is a water-soluble and oil-soluble annatto colorant containing about 2.5% colorant, CH
R. It is a product of the Hansen company.

The above mixture was applied to the inner surface of the cellulose casing by the foaming method at 0.04 ml / d per unit area.
A colorant corresponding to m ² , ie 1.1 mg / dm ² , was applied uniformly.

The water content of the casing was adjusted to 14%. Folding of the casing was difficult.

After folding the casing, the casing was packed with a meat emulsion and then the sausage was processed and peeled.

The sausage obtained had a non-uniform appearance and was easily removed by the epidermis.

Example 5 This example is another casing prepared by treating another casing with another annat-colorant mixture to transfer the red-orange color substantially evenly to the food product packed in the casing. Is.

The amounts of the components of the following composition were mixed and dispersed using a high power mixer: Composition A-4000-OSS 5 ml A-4000-WS-P 21.4 g Glycerin 45 ml Tween 80 1 g Water 49 ml

A-4000-WS-P is a water-soluble powdered annatto colorant containing about 14% colorant, CHR.
It is a product of the Hansen company.

The above mixture was applied to the inner surface of the cellulose casing by the foaming method at 0.03 ml / d per unit area.
A colorant corresponding to m ² , ie 0.90 mg / dm ² , was applied uniformly.

The water content of the casing was adjusted to 14%, after folding the casing, the casing was packed with a meat emulsion and then the sausage was processed and peeled.

The sausage obtained is a substantially uniform red
It was colored orange.

Example 6 This example treats a casing with a mixture of an oily substance and a water-soluble annatto colorant so as to transfer the red-orange color to the food packaged in the casing substantially uniformly. It is a casing.

The amounts of the components of the following composition were mixed and dispersed using a high power mixer: Composition Delios V 20 ml AN-14 WP 25 g Glycerin 45 ml Tween 80 2.5 g Carboxymethylcellulose (Natrium salt) (Walocel) 0.64 g Water 35 ml

Delios V is a vegetable oil manufactured by Henkel Company.

The above mixture was applied to the inner surface of the cellulose casing by the foaming method at 0.066 ml / dm 3
A colorant corresponding to ² , ie 2.3 mg / dm ² , was applied uniformly.

The water content of the casing was adjusted to 14%, after folding the casing, the casing was filled with meat emulsion, then the sausage was processed and peeled.

The sausage obtained has a substantially uniform red color.
It was colored orange.

Example 7 Samples of several casings were prepared using the treatment method described in each of the above examples and sausages were produced using these casings.

The color of each sausage is Dr. Lange (Dr.
LANGE) microcolor colorimeter. Color is indicated by L * a * b *. The L * value is the transparency of the sample, the a * value is the red or red color saturation of the sample, and the b * value is the yellow or yellow color saturation of the sample.

The measurement results were as shown in the table below: Sample L * a * b * Note 1 45.2 36.3 43.9 Proper 2 47.5 29.2 45.8 Casing surface beam 3 59. 4 10.4 17.6 Small amount of coloring 4 49.3 34.3 45.3 Non-uniformity, weak foldability 5 49.9 31.4 46.6 Proper 6 44.9 34 46.9 Proper adjustment sausage No color 62.4 6.2 11.6 Commercially colored sausage 46.1 34.1 40.5

The sausages produced using the present invention were very similar in color to those colored using known bath processing methods.

Continued Front Page (72) Inventor Carlos Longo Areso Spain 31007 Pamplona (Navala), Iturama No. 23 Entreplanter

Claims (34)

[Claims] 1. A cellulose casing which transfers color to a sausage while processing the sausage, at least two components, one being a water-soluble annatto colorant and the other one or more oily substances. A sausage casing, characterized in that it has a macroscopically homogeneous inner coating consisting of. 2. The casing according to claim 1, wherein the oily substance component of the inner coating film is an oily bixin solution, an oily bixin dispersion or an oily bixin emulsion. 3. The casing according to claim 2, wherein the oily bixin solution contains bixin in a concentration of 0.1% to 5%. 4. The oily substance component of the internal coating film is animal oil.
The casing according to item 1. 5. The oily substance component of the inner coating film is vegetable oil.
The casing according to item 1. 6. The oily substance component of the internal coating film is mineral oil.
The casing according to item 1. 7. The casing according to claim 1, wherein the oily substance component of the internal coating film is silicone oil. 8. The oily substance component of the inner coating film is a synthetic oil.
The casing according to item 1. 9. The casing according to claim 1, wherein the oily substance component of the internal coating film is a mixture or combination of two or more oils according to items 2 to 8. 10. A coloring agent whose inner coating film is represented by norbixin is 0.2 to 9 per unit area on the inner surface of the casing.
mg / dm ² , oily substance 1 to 25 mg per unit area
The casing according to any one of the first item, the second item, and the fourth item to the eighth item, which contains / dm ² . 11. The casing according to claim 10, wherein the oily substance is contained on the inner surface of the casing in an amount of 3 to 15 mg / dm ² per unit area. 12. A tenth aspect, wherein the coloring agent represented by norbixin contains 1 to 2.5 mg / dm ^{2 on} the inner surface of the casing.
Or the casing according to item 11. 13. The casing according to claim 1, wherein the internal coating film contains at least a peeling substance or a mixture in addition to the water-soluble annatto colorant and the oily substance. 14. A casing according to claim 13, wherein the peeling substance or mixture comprises at least cellulose ether. 15. A casing according to claim 13, wherein the peeling material or mixture comprises at least carboxymethyl cellulose. 16. The internal coating film contains at least an emulsifier in addition to the water-soluble annatto colorant and the oily substance, and
The casing according to any one of item 12. 17. The internal coating film comprises a water-soluble annatto colorant,
The casing according to any one of items 13 to 15, which contains at least an emulsifier in addition to the oily substance and the peeling substance or the mixture. 18. The casing according to claim 16 or 17, wherein the emulsifier is lecithin. 19. The casing according to claim 16 or 17, wherein the emulsifier is an ester of ethylene oxide adduct and a partial fatty acid or an anhydride ester of a partial fatty acid and a sorbitan derivative. 20. A fiber net is embedded in the wall of the casing,
The casing according to any one of items 1 to 19. 21. In forming a coating film on the inner surface of the regenerated cellulose casing according to any one of claims 1 to 20, a coating solution comprising at least a water-soluble annatto colorant and one or more oily substances is used. The inner surfaces of the casing are brought into contact with each other, and the concentration of the water-soluble coloring agent represented as norbixin on one side is 0.2% to 10%, and the concentration of the oily substance on the other side is 0.5% to 25%. A method for forming a coating film on the inner surface of a casing, characterized in that 22. The concentration of the oily substance is 3% to 15%,
The method according to paragraph 21. 23. The oily substance component of the coating liquid is a bixin solution,
Second, which is a bixin dispersion or a bixin emulsion
The method according to item 2. 24. The method according to claim 21, wherein the coating liquid contains at least a peeling substance or a peeling mixture substance in addition to the water-soluble annatto colorant and the oily substance. 25. The method according to claim 24, wherein the debarking material or debarking mixed material comprises at least cellulose ether. 26. The method of claim 24, wherein the debarking material or debarking mixed material comprises at least carboxymethyl cellulose. 27. The method according to claim 21, wherein the coating liquid contains at least an emulsifier in addition to the water-soluble annatto colorant and the oily substance. 28. The method according to claim 27, wherein the emulsifier is lecithin. 29. The method according to claim 27, wherein the emulsifier is an ester of an ethylene oxide adduct and a partial fatty acid or an ester of a partial fatty acid and a sorbitan derivative anhydride. 30. The coating liquid comprises, in addition to the water-soluble annatto colorant and the oily substance, at least 5% to 6% of the total weight of the coating liquid.
A method according to claim 21, comprising 0% plasticizer. 31. The method of claim 30, wherein the plasticizer is glycerin. 32. The plasticizer is propylene glycol,
The method according to paragraph 30. 33. A colored sausage produced by using the casing according to any one of claims 1 to 20. 34. A method for producing a colored sausage by packing meat in the casing according to any one of claims 1 to 20.