US225282A - heckmann - Google Patents
heckmann Download PDFInfo
- Publication number
- US225282A US225282A US225282DA US225282A US 225282 A US225282 A US 225282A US 225282D A US225282D A US 225282DA US 225282 A US225282 A US 225282A
- Authority
- US
- United States
- Prior art keywords
- paper
- solution
- size
- rolls
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000004040 coloring Methods 0.000 description 6
- 238000002845 discoloration Methods 0.000 description 6
- 206010037844 Rash Diseases 0.000 description 4
- XFXPMWWXUTWYJX-UHFFFAOYSA-N cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229940072033 potash Drugs 0.000 description 4
- 235000015320 potassium carbonate Nutrition 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 240000002027 Ficus elastica Species 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000015055 Talinum crassifolium Nutrition 0.000 description 2
- 240000001168 Talinum fruticosum Species 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001195 polyisoprene Polymers 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
- D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
Definitions
- the improvements are performed by placing in the size (used in the finishing process of pa per-makin g) equal parts of prussiate of potash and sulphuret of ammonia, in the proportions,
- the sizing -trough be at least twelve inches away from the back of the rolls, because, if such be not the case, the froth caused by the paper passing through the second solution would attach itself to the paper in the shape of small globules, and so prevent the second solution from attaching itself to the already sensitized paper, and there by causing White spots.
- the first solution is best formed of half size and half water of not less temperature than that ordinarily used for sizing paper.
- the chemicals previously dissolved separately, to be added separately.
- the second solution is best formed of three parts water to one part size, or sufficient size to cause the paper to float on the rolls.
- the temperature in the drying-room must not exceed 80 or 90 Fahrenheit, for if in excess it renders the paper harsh.
Landscapes
- Paper (AREA)
Description
UNITED STATES PATENT OFFICE.
NAPOLEON J. HEGKMANN,
OF LOUGHTON, ENGLAND.
SPECIFICATION forming part of Letters Patent No. 225,282, dated March 9, 18 80. Application filed October 8, 1879. Patented in England, February 6, 1879.
To all whom it may concern Be it known that I, NAPOLEON J OSEPH HEOKMANN, of Loughton, in the county of Essex, England, have invented a new and useful Process for Treating Paper for Detective Purposes, which is fully set forth and described in the following specification.
The improvements are performed by placing in the size (used in the finishing process of pa per-makin g) equal parts of prussiate of potash and sulphuret of ammonia, in the proportions,
or near thereto, of one of each to about twenty of size. The paper or parchment is passed through this solution and finished as in making ordinary paper. Any color or tint can be added, as at present. I prefer, however, to use sulphate of manganese and sulphate of copper, seven of the first to I fonrot'the latter, for the colorin g-matter, added to tWo hundred and forty weight of liquid, consisting of three parts water to one part size, or
snfficient size to cause the paper to float, combined with the detective ingredients first above mentioned.
As most attempts at erasure by chemical means would leave a dark discoloration on paper so treated, great care is necessary in keeping utensils wherein to dissolve the chemicals, as in no case must the ingredients for the coloring come in contact with those chemicals in the first solution, because in that event it would cause a precipitate which would be on the surface of the paper. and not become embodied therein. It is also imperative that the rolls of the sizing-machine be without eruption or indentation, as the re sult would be a streak upon the surface of the paper when passing through the coloring so. lution. This precaution is not necessary when the paper is passing through the first solution. Therefore, to obviate this discoloration, the rolls of the sizer must be coated with at least a half inch in thickness of vulcanized indiarubber.
If ordinary metal rolls be used for the first operation, they should be free of any eruption ofindents on the surface, so as to render them fit for the second or coloring operation. Care must be taken that after the paper has passed through the first solution the rolls and the size-trough be thoroughly cleansed with a solution consisting of one part sulphuric acid to eight parts of water, until the discoloration caused by the sulphuret of ammonia is removed. Should the rolls be covered with vulcanized rubber it will only be necessary to use clean water to remove any traces of thefirst solution before using the second. It is further necessary that the sizing -trough be at least twelve inches away from the back of the rolls, because, if such be not the case, the froth caused by the paper passing through the second solution would attach itself to the paper in the shape of small globules, and so prevent the second solution from attaching itself to the already sensitized paper, and there by causing White spots.
The best paper for use is that known by the term water-leaf.
The first solution is best formed of half size and half water of not less temperature than that ordinarily used for sizing paper. the chemicals, previously dissolved separately, to be added separately. l
The second solution is best formed of three parts water to one part size, or sufficient size to cause the paper to float on the rolls.
In the drying process the temperature in the drying-room must not exceed 80 or 90 Fahrenheit, for if in excess it renders the paper harsh.
I claim as my invention- The process of preparing detective-paper by placing in the finishing-size prussiate of potash and sulphuret of ammonia, substantially in the manner described.
In testimony whereof I have signed this specification in the presence of two subscribing witnesses.
N. J. HEGKMANN.
Publications (1)
Publication Number | Publication Date |
---|---|
US225282A true US225282A (en) | 1880-03-09 |
Family
ID=2294671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US225282D Expired - Lifetime US225282A (en) | heckmann |
Country Status (1)
Country | Link |
---|---|
US (1) | US225282A (en) |
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0
- US US225282D patent/US225282A/en not_active Expired - Lifetime
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