CN108392435A - A kind of silk mask - Google Patents

Abstract

The invention discloses a silk facial mask, which is prepared by the following steps: (1) partial degumming; (2) pretreatment; (3) fiber dissociation; (4) forming paper; (5) drying and forming; type. In the present invention, the base cloth of silk mask is made by the traditional papermaking method. The silk is not chemically modified, and has the characteristics of being skin-friendly and non-irritating. Sericin is added to the base cloth of the silk mask, and under the action of water, the sericin becomes a gel. shape, plays a supporting role to the silk mask base fabric, can improve the mechanical properties of the silk mask, and has strong efficacy at the same time. The silk mask of the present invention has effects such as soothing, calming, whitening, and moisturizing. The invention recycles the sericin waste liquid, which is safe and environment-friendly. The invention has the advantages of simple process, strong operability, less denaturation loss of the sericin protein, maximum preservation of the nutrition and skin care effects of the silk gum protein, and is an ideal base material for a facial mask.

Description

A silk mask

technical field

The invention relates to the technical field of cosmetics, in particular to a silk mask.

Background technique

In order to improve skin condition and enhance personal image, facial mask has become the preferred skin care material for people at present. Most of the facial masks supplied on the market are based on fiber film-forming materials as carrier (ie facial mask base cloth), supplemented with carrier-type fiber facial masks of nutritional ingredients and medicine. Due to the closed nature of the mask, the irritation of the ingredients is amplified, which can easily lead to skin allergies and damage to the barrier. Silk masks emerged at the historic moment, but the silk masks on the market did not get rid of the pattern of traditional masks. Most of the so-called "silk masks" were just gimmicks, and the base fabric was still chemical fiber. Therefore, look forward to the appearance of a real natural pure silk mask.

Silk is a continuous long fiber formed by coagulation of the silk liquid secreted by cooked silkworms when they cocoon. It is a natural protein fiber that is non-toxic to the human body, safe and reliable, and has excellent skin compatibility. It includes silk fibroin and Sericin, silk fibroin is the main body of silk fiber, with a content of about 75%. Sericin is coated on the outside of silk fibroin, with a content of about 25%, which plays a role in protecting silk fibroin. Silk fibroin is rich in protein and contains 18 kinds of amino acids. It is naturally skin-friendly and suitable for making silk mask base fabrics. The molecular conformation of sericin is mainly random coil, and the molecular space structure is loose. There are many amino acids with long side chains on the sericin chain, such as arginine, lysine, glutamic acid, methionine, and tryptophan. Acid, tyrosine, etc., and many polar hydrophilic groups are on the surface of the polypeptide chain. These structural features endow sericin with excellent moisturizing, whitening, nutrition, and anti-oxidation effects.

Contents of the invention

In order to solve the problems in the prior art, the object of the present invention is to provide a silk facial mask.

To achieve the above object, the invention provides a kind of silk facial mask, and described silk facial mask is made by following steps:

(1) Partial degumming: Partially degumming the mill silk with lye, filtering to obtain filtrate and filter residue, wherein, the filtrate is purified to obtain silk gum, and the filter residue is washed with water and dried to obtain a residual glue rate of 3 -6% silk fiber;

(2) Pretreatment: Soak the silk fiber with sodium bicarbonate solution to make it swell;

(3) Fiber dissociation: the impregnated silk fiber is transferred to a fiber dissociation device in its wet state for dissociation;

(4) Paper formation: neutralize the dissociated fiber solution with acid to obtain a suspension, precipitate and remove water, and make paper on a paper former;

(5) Drying and molding: drying on a paper dryer to obtain a silk facial mask base cloth;

(6) Forming: Arrange the silk mask base on the mask mold, add the silk gum protein, preservative, and water in step (1), and place it in a sterile environment until a gel is formed, that is, a silk mask is made.

Further, in step (1), the lye contains 4-6g/L industrial soap and 2-3g/L soda ash, the soaking temperature is 70-80°C, and the soaking time is 30-40min.

Further, in the step (1), the sericin is produced through primary filtration, ultrafiltration membrane filtration, concentration, and freeze-drying. The sericin liquid in the filtrate can be separated by the conventional ultrafiltration membrane separation method in the field, and further concentrated and freeze-dried to obtain the sericin.

Further, in step (1), the filter residue is washed in sequence with hot water at 75-85°C for 5 minutes, warm water at 45-55°C for 5 minutes, and room temperature water at 20-25°C for 5 minutes, and placed in an oven at 105-110°C for drying to constant weight.

The purpose of the pretreatment in step (2) is to make the remaining silk gum in the silk fiber in a state of swelling and insolubilization, wash the impregnated silk fiber in cold water and then dry it to test its residual glue rate. The greater the residual glue rate, the more The less the sericin is dissolved and lost.

As preferably, in step (2), silk fiber is cut into the fiber that length is 0.8-1.2cm, and bath ratio is 1:80-120, and sodium bicarbonate solution concentration is 0.8-1g/L, soaking temperature is 20- Soak for 1-2 minutes at 30°C. After testing, under this process condition, the residual glue rate is reduced by no more than 10%, and the sericin protein contained in the silk fiber is greatly preserved.

Fiber dissociation: The silk fiber pretreated by lye is fully interrupted and disintegrated under the action of high-speed mechanical shear.

Preferably, in step (3), mechanically stir for 2-2.5 hours in a fiber dissociator with a bath ratio of 1:300-350 and a stirring speed of 4500-5500 r/min.

Further, in step (4), neutralize the dissociated fiber solution with glacial acetic acid with a concentration of 0.1-0.3 mol/L, then add 3-5 times of water to dilute to make a fiber suspension, precipitate to remove water, Papermaking was done on a sheet former at 35-45 g/m ² .

Further, in step (5), drying is carried out at a temperature lower than 60°C.

Further, in step (6), in parts by weight, 1-2 parts of the silk facial mask base cloth, 10-20 parts of sericin, 1-3 parts of preservative, and 75-88 parts of water.

Further, the preservative includes one or more of 1,2-pentanediol, glyceryl caprylate, sorbitan caprylate, and p-hydroxyacetophenone.

The present invention has the following advantages:

1. The present invention makes the silk facial mask base fabric through the traditional papermaking method. The silk is not chemically modified, and has the characteristics of being skin-friendly and non-irritating. Sericin is added to the silk facial mask base fabric. Under the action of water, the silk gum protein becomes Gel-like, supports the base fabric of the silk mask, can improve the mechanical properties of the silk mask, and has strong efficacy. The silk mask of the present invention has the functions of soothing, calming, whitening, moisturizing and the like.

2. The present invention recycles sericin waste liquid, which is safe and environment-friendly. The invention has the advantages of simple process, strong operability, less denaturation loss of the sericin protein, maximum preservation of the nutrition and skin care effects of the silk gum protein, and is an ideal base material for a facial mask.

Detailed ways

The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Raw materials and instruments used in the following examples are as follows:

Factory silk, purchased from Chongqing Xiangfei Company, after testing, the total glue content of factory silk is 21.32-21.96%;

Ultrafiltration membrane, purchased from Koch Membrane Technology Co., Ltd.;

Oven, purchased from Changzhou Zhengda General Textile Instrument Co., Ltd., model YG747;

pH meter, purchased from Ark Technology, model pHS-3C;

Fiber dissociator, purchased from Dongguan Internaissance Precision Instrument Co., Ltd., model IMT-SJ02;

Paper former, purchased from Dongguan Internaise Precision Instrument Co., Ltd., model IMT-CP02A;

The paper dryer was purchased from Dongguan Internassun Precision Instrument Co., Ltd., model IMT-GZ01.

Example 1

A silk mask made by the following steps:

(1) Partial degumming: use lye containing 6g/L industrial soap and 3g/L soda ash, soak for 30min at a temperature of 70°C, and filter to obtain the filtrate and filter residue, wherein the filtrate is filtered through primary filtration and ultrafiltration membrane , concentrated, and freeze-dried to make silk fibroin, and the filter residue was washed in 85°C hot water for 5 minutes, 45°C warm water for 5 minutes, and 20°C room temperature water for 5 minutes, then placed in an oven at 110°C and dried to constant weight to obtain residual glue. Silk fiber with a rate of 4.40%;

(2) Pretreatment: Cut the silk fibers into fibers with a length of 0.8 cm, and soak them for 1.5 min at a liquor ratio of 1:100, a sodium bicarbonate solution concentration of 0.9 g/L, and a temperature of 25° C.;

(3) Fiber dissociation: transfer the impregnated fiber in its wet state to a fiber dissociator with a bath ratio of 1:350 and a stirring speed of 5500 r/min for dissociation, and mechanically stir for 2 hours;

(4) Forming paper: neutralize the dissociated fiber solution with glacial acetic acid with a concentration of 0.1mol/L, then add 3 times of water to dilute to make a fiber suspension, precipitate and remove water, and place it on the paper former with 35g/m ² for papermaking;

(5) Drying and molding: drying on a paper dryer to obtain a silk facial mask base cloth;

(6) Forming: Arrange the silk mask base on the mask mold, add the silk gum protein, preservative and water in step (1), and place it in a sterile environment until a gel is formed, which is to make a silk mask, wherein , 1 part of silk mask base fabric, 10 parts of silk gum protein, 1 part of preservative, 75 parts of water.

Example 2

A silk mask made by the following steps:

(1) Partial degumming: use lye containing 4g/L industrial soap and 3g/L soda ash, soak for 35 minutes at a temperature of 75°C, and filter to obtain the filtrate and filter residue, wherein the filtrate is filtered through primary filtration and ultrafiltration membrane , concentrated, and freeze-dried to make silk gum protein, and the filter residue was washed in 75°C hot water for 5 minutes, 50°C warm water for 5 minutes, and 20°C room temperature water for 5 minutes, then placed in an oven at 105°C and dried to constant weight to obtain residual glue. Silk fiber with a rate of 4.35%;

(2) Pretreatment: Cut the silk fibers into fibers with a length of 1.0 cm, and soak them for 2 minutes at a bath ratio of 1:80, a sodium bicarbonate solution concentration of 0.8 g/L, and a temperature of 30° C.;

(3) Fiber dissociation: transfer the impregnated fiber in its wet state to a fiber dissociation device with a bath ratio of 1:300 and a stirring speed of 4500 r/min for dissociation, and mechanically stir for 2.5 hours;

(4) Form paper: neutralize the dissociated fiber solution with glacial acetic acid with a concentration of 0.5mol/L, then add 5 times of water to dilute to make a fiber suspension, precipitate and remove water, and place it on the paper former with 40g/m ² for papermaking;

(5) Drying and molding: drying on a paper dryer to obtain a silk facial mask base cloth;

(6) Forming: Arrange the silk mask base on the mask mold, add the silk gum protein, preservative and water in step (1), and place it in a sterile environment until a gel is formed, which is to make a silk mask, wherein , 1.5 parts of silk mask base fabric, 20 parts of silk gum protein, 3 parts of preservatives, and 75 parts of water.

Example 3

A silk mask made by the following steps:

(1) Partial degumming: use lye containing 6g/L industrial soap and 2g/L soda ash, soak for 40min at a temperature of 70°C, and filter to obtain the filtrate and filter residue, wherein the filtrate is filtered through primary filtration and ultrafiltration membrane , concentrated, and freeze-dried to make silk fibroin, and the filter residue was washed in 85°C hot water for 5 minutes, 45°C warm water for 5 minutes, and 20°C room temperature water for 5 minutes, then placed in an oven at 105°C and dried to constant weight to obtain residual glue. Silk fiber with a rate of 4.26%;

(2) Pretreatment: cut the silk fibers into fibers with a length of 1.0 cm, soak for 1 min at a bath ratio of 1:120, a sodium bicarbonate solution concentration of 0.9 g/L, and a temperature of 30° C.;

(3) Fiber dissociation: transfer the impregnated fiber in its wet state to a fiber dissociator with a bath ratio of 1:340 and a stirring speed of 5200r/min for dissociation, and mechanically stir for 2.5h;

(4) Forming paper: neutralize the dissociated fiber solution with glacial acetic acid with a concentration of 0.15mol/L, then add 5 times of water to dilute to make a fiber suspension, precipitate and remove water, and place it on the paper former with 45g/m ² for papermaking;

(5) Drying and molding: drying on a paper dryer to obtain a silk facial mask base cloth;

(6) Forming: Arrange the silk mask base on the mask mold, add the silk gum protein, preservative and water in step (1), and place it in a sterile environment until a gel is formed, which is to make a silk mask, wherein , 2 parts of silk mask base fabric, 20 parts of silk gum protein, 3 parts of preservative, 75 parts of water

Example 4

A silk mask made by the following steps:

(1) Partial degumming: use lye containing 4g/L industrial soap and 3g/L soda ash, soak for 30min at a temperature of 80°C, and filter to obtain the filtrate and filter residue, wherein the filtrate is filtered through primary filtration and ultrafiltration membrane , concentrated, and freeze-dried to make silk gum, and the filter residue was washed in 80°C hot water for 5 minutes, 50°C warm water for 5 minutes, and 20°C room temperature water for 5 minutes, and then placed in an oven at 110°C and dried to constant weight to obtain residual glue. Silk fiber with a rate of 4.42%;

(2) Pretreatment: cut the silk fibers into fibers with a length of 0.9 cm, and soak for 1 min under the condition that the bath ratio is 1:100, the concentration of sodium bicarbonate solution is 1 g/L, and the soaking temperature is 20° C.;

(3) Fiber dissociation: transfer the impregnated fiber in its wet state to a fiber dissociator with a bath ratio of 1:300 and a stirring speed of 5000 r/min for dissociation, and mechanically stir for 2 hours;

(4) Forming paper: neutralize the dissociated fiber solution with glacial acetic acid with a concentration of 0.2mol/L, then add 4 times of water to dilute to make a fiber suspension, precipitate and remove water, and place it on the paper former with 40g/m ² for papermaking;

(5) Drying and molding: drying on a paper dryer to obtain a silk facial mask base cloth;

(6) Forming: Arrange the silk mask base on the mask mold, add the silk gum protein, preservative and water in step (1), and place it in a sterile environment until a gel is formed, which is to make a silk mask, wherein , 1 part of silk mask base fabric, 20 parts of silk gum protein, 2 parts of preservatives, 78 parts of water.

Example 5

A silk mask made by the following steps:

(1) Partial degumming: use lye containing 5g/L industrial soap and 2g/L soda ash, soak for 35min at a temperature of 70°C, and filter to obtain the filtrate and filter residue, wherein the filtrate is filtered through primary filtration and ultrafiltration membrane , concentrated, and freeze-dried to make silk gum protein, and the filter residue was washed in 80°C hot water for 5 minutes, 55°C warm water for 5 minutes, and 25°C room temperature water for 5 minutes, and then placed in an oven at 105°C and dried to constant weight to obtain residual glue. Silk fiber with a rate of 4.18%;

(2) Pretreatment: Cut the silk fiber into a fiber with a length of 1.2 cm, and soak it for 1.5 min at a bath ratio of 1:90, a sodium bicarbonate solution concentration of 1 g/L, and a temperature of 25° C.;

(3) Fiber dissociation: transfer the impregnated fiber in its wet state to a fiber dissociator with a bath ratio of 1:320 and a stirring speed of 5000 r/min for dissociation, and mechanically stir for 2.5 hours;

(4) Forming paper: neutralize the dissociated fiber solution with glacial acetic acid with a concentration of 0.3mol/L, then add 3 times of water to dilute it to make a fiber suspension, precipitate and remove water, and use it on the paper former 35g/m ² for papermaking;

(5) Drying and molding: drying on a paper dryer to obtain a silk facial mask base cloth;

(6) Forming: Arrange the silk mask base on the mask mold, add the silk gum protein, preservative and water in step (1), and place it in a sterile environment until a gel is formed, which is to make a silk mask, wherein , 2 parts of silk mask base cloth, 15 parts of silk gum protein, 1 part of preservative, and 88 parts of water.

Example 6

A silk mask made by the following steps:

(1) Partial degumming: use lye containing 4.5g/L industrial soap and 2.5g/L soda ash, soak for 30min at a temperature of 70°C, and filter to obtain the filtrate and filter residue, wherein the filtrate is prefiltered and ultrafiltered Membrane filtration, concentration, and freeze-drying were used to produce silk gum protein. The filter residue was washed in hot water at 75°C for 5 minutes, warm water at 55°C for 5 minutes, and room temperature water at 20°C for 5 minutes, and then dried in an oven at 110°C until constant weight was obtained. Silk fiber with a residual glue rate of 5.18%;

(2) Pretreatment: Cut the silk fibers into fibers with a length of 0.9 cm, and soak them for 2 minutes at a bath ratio of 1:100, a sodium bicarbonate solution concentration of 0.9 g/L, and a temperature of 30° C.;

(3) Fiber dissociation: transfer the impregnated fiber in its wet state to a fiber dissociator with a bath ratio of 1:300 and a stirring speed of 5000 r/min for dissociation, and mechanically stir for 2 hours;

(4) Forming paper: neutralize the dissociated fiber solution with glacial acetic acid with a concentration of 0.25mol/L, then add 5 times of water to dilute to make a fiber suspension, precipitate and remove water, and place it on the paper former with 45g/m ² for papermaking;

(5) Drying and molding: drying on a paper dryer to obtain a silk facial mask base cloth;

(6) Forming: Arrange the silk mask base on the mask mold, add the silk gum protein, preservative and water in step (1), and place it in a sterile environment until a gel is formed, which is to make a silk mask, wherein , 1 part of silk mask base cloth, 10 parts of silk gum protein, 2 parts of preservatives, 82 parts of water.

test case

1. Test the sensory and physical and chemical indicators of the silk facial mask of the present invention

See Table 1 for the sensory index and physical and chemical index test results of the silk mask of Example 1 of the present invention.

Table 1

The sensory index and physicochemical index test result of the silk facial mask of embodiment 2-6 has no significant difference with embodiment 1.

The results show that: the sensory and physical and chemical indicators of the silk mask of the present invention all meet the requirements of my country's mask industry standard QB/T2872-2017, and the product is stable, close to the pH value of the skin, mild and non-irritating.

2, the silk mask of the present invention is carried out hygienic microbiological inspection and hygienic chemical inspection

The hygienic microbial inspection and hygienic chemical inspection results of the silk facial mask of Example 1 of the present invention are shown in Table 2.

Table 2

The hygienic microbial inspection and the hygienic chemical inspection results of the silk facial mask of embodiment 2-6 have no significant difference with embodiment 1.

The result shows that: the silk facial mask of the present invention is safe and hygienic, and conforms to the Hygienic Standard for Cosmetics.

3. Test the safety and skin irritation of the silk facial mask of the present invention

3.1 Take 36 fertilized SPF chicken embryos of 9-day-old Bailaihang chickens and divide them into experimental groups 1-6, with 6 chicken embryos in each group. Mark the position of the air cell on the surface of the eggshell, peel off the marked part of the eggshell with dental serrated curved tweezers, and expose the white egg membrane, and use a pipette to add 2 mL of 0.9% sodium chloride (NaCl) solution dropwise to infiltrate the egg membrane, slurry chlorine The sodium chloride solution was poured out, and the intima was carefully removed with tweezers to ensure that the vascular membrane was not damaged. Cut the silk mask of Example 1-6 of 1cm×1cm, and stick it directly on the CAM membrane of each chicken embryo in the experiment 1-6 group accordingly, remove the silk mask after 3min, and rinse gently with normal saline, and observe after 30s Experimental results. The sum of the scores reflects the degree of potential eye irritation and corrosiveness of the tested substance. The results are shown in Table 3.

table 3

sample score total score result Example 1 0+0+0+0+0+0 0 non-irritating Example 2 0+0+0+0+0+0 0 non-irritating Example 3 0+0+0+0+0+0 0 non-irritating Example 4 0+0+0+0+0+0 0 non-irritating Example 5 0+0+0+0+0+0 0 non-irritating Example 6 0+0+0+0+0+0 0 non-irritating

The result shows that: the silk facial mask of the present invention has no eye irritation and potential skin irritation. (Refer to SN/T 2329-2009 Cosmetic Eye Irritation/Corrosion Test for Chicken Chorioallantoic Membrane)

3.2 Closed patch

Get the silk mask of the embodiment of the present invention 1-6 and put it into the spot tester. 30 healthy subjects were randomly selected, and the spot tester was pasted on the forearm flexion of the subjects with non-irritating tape, and lightly pressed with the palm to make it evenly applied for 24 hours. After removing the spot tester for 30 minutes, the skin adverse reactions were scored and graded. The results are shown in Table 4.

Table 4

sample Level of reaction rating scale skin reaction Number of adverse reactions Example 1 - 0 negative reaction 0 Example 2 - 0 negative reaction 0 Example 3 - 0 negative reaction 0 Example 4 - 0 negative reaction 0 Example 5 - 0 negative reaction 0 Example 6 - 0 negative reaction 0

The result shows that: the silk facial mask of the present invention has no adverse effect on human skin. (Refer to "Hygienic Standards for Cosmetics")

4. Evaluate the sense of use of the silk facial mask of the present invention

180 healthy subjects were randomly selected, randomly grouped, and divided into experimental groups 1-6, with 30 people in each group. The subjects of experiment 1-6 groups respectively applied the silk mask of the embodiment 1-6 of the present invention on the face after cleansing their faces for 5 minutes, and took them off after 20 minutes. After waiting for 30 minutes, fill out the questionnaire, and get the results through statistics. The results are shown in Table 5.

table 5

The result shows that: the silk facial mask of the present invention is well received by the public and meets the requirements of consumers. And make the public understand the real silk mask, and contribute to the protection of the traditional culture of the Chinese nation.

Although the present invention has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Claims (10)

1. a kind of silk mask, which is characterized in that the silk mask is made of following steps：

(1) part degumming：Part degumming process is carried out to filature silk with lye, filtrate and filter residue is obtained by filtration, wherein the filtrate Purified to obtain silk glue protein, the filter residue obtains the silk fiber that residual gum content is 3-6% after washing, drying；

(2) it pre-processes：The immersion of silk fiber sodium bicarbonate solution is made into its swelling；

(3) fiber dissociates：By the silk fiber of dipping, it is transferred in fiber dissociation device and is dissociated under its hygrometric state；

(4) at paper：Fiber solution acid after dissociation is neutralized and obtains suspension, precipitation water removal carries out on sheet forming apparatus Copy paper；

(5) drying and moulding：It is dried on sheet dryer, silk mask base fabric is made；

(6) excipient：Silk mask base fabric is placed on facial mask mold, be added the silk glue protein in step (1) and preservative, Water is placed in gnotobasis, until forming gel, that is, silk mask is made.

2. silk mask according to claim 1, which is characterized in that in step (1), contain 4-6g/L's in the lye The soda ash of industrial soap and 2-3g/L, soaking temperature are 70-80 DEG C, soaking time 30-40min.

3. silk mask according to claim 1, which is characterized in that in step (1), the silk glue protein is by just Filter, ultrafiltration membrance filter, concentration, freeze-drying are made.

4. silk mask according to claim 1, which is characterized in that in step (1), the filter residue is successively through 75-85 DEG C Hot water wash 5min, 45-55 DEG C warm water wash 5min, 20-25 DEG C room temperature washing 5min, be placed in 105-110 DEG C of baking oven and dry To constant weight.

5. silk mask according to claim 1, which is characterized in that in step (2), silk fiber, which is cut into length, is The fiber of 0.8-1.2cm is 1 in bath raio:80-120, a concentration of 0.8-1g/L of sodium bicarbonate solution, the item that temperature is 20-30 DEG C Under part, 1-2min is impregnated.

6. silk mask according to claim 1, which is characterized in that be 1 in bath raio in step (3):300-350, stirring Speed is mechanical agitation 2-2.5h in the fiber dissociation device of 4500-5500r/min.

7. silk mask according to claim 1, which is characterized in that in step (4), by the fiber solution after dissociation with dense The glacial acetic acid that degree is 0.1-0.3mol/L neutralizes, and then the water of 3-5 times of addition, which is diluted, is made fibrous suspension, and precipitation is removed Water, with 35-45g/m on sheet forming apparatus²Amount carry out copy paper.

8. silk mask according to claim 1, which is characterized in that in step (5), carried out at a temperature of less than 60 DEG C It is dry.

9. silk mask according to claim 1, which is characterized in that in step (6), count in parts by weight, the silk 1-2 parts of mask substrate, -20 parts of silk gum protein 10,1-3 parts of preservative, 75-88 parts of water.

10. silk mask according to claim 1, which is characterized in that the preservative is sweet including 1,2- pentanediols, octanoic acid One or more of the smooth caprylate of grease, sorb, parahydroxyacet-ophenone.