GB633747A - Improvements in or relating to paper base planographic printing plates - Google Patents
Improvements in or relating to paper base planographic printing platesInfo
- Publication number
- GB633747A GB633747A GB2343147A GB2343147A GB633747A GB 633747 A GB633747 A GB 633747A GB 2343147 A GB2343147 A GB 2343147A GB 2343147 A GB2343147 A GB 2343147A GB 633747 A GB633747 A GB 633747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- water
- casein
- solution
- formaldehyde
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
- B41N3/03—Chemical or electrical pretreatment
- B41N3/036—Chemical or electrical pretreatment characterised by the presence of a polymeric hydrophilic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1091—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by physical transfer from a donor sheet having an uniform coating of lithographic material using thermal means as provided by a thermal head or a laser; by mechanical pressure, e.g. from a typewriter by electrical recording ribbon therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Printing Plates And Materials Therefor (AREA)
- Paper (AREA)
Abstract
633,747. Printing-surfaces. WARREN CO., S..D. Aug. 25, 1947, No. 23431. Convention date, May 9. [Class 100 (ii)] A planographic printing-surface comprising a paper base sheet having thereon a hydrophilic image-receptive surface is formed with a coating containing a water-soluble water-stable salt of a bivalent metal, which renders the printing- surface impenetrable to both grease and water while permitting the surface to take both grease and water. The paper base is made from beaten soda pulp and sulphate or bleached kraft, rosinsize, melamine formaldehyde resin, and alum, and is preferably surface-sized with ammoniacal casein and formaldehyde. The melamine formaldehyde may be replaced by urea formaldehyde or viscose. The paper is coated with a base coat composed of finely-divided pigment clay, 100 parts by weight, a hydrophilic adhesive base, e.g. casein in ammonia solution 17.5 parts, and dimethylolurea 1.75 parts. The proportions can be varied and the casein replaced by glue, gelatine, soya bean proteid, zein, gum arabic, insolubilized starch, or polyvinyl alcohol. The clay may be replaced by barium sulphate, calcined clay, talc, satinwhite, or titanium di-oxide. The material is now coated on one side with a hydrophilic colloid coating such as sodium alginate 1 part by weight, water 95 parts, and butanol 4 parts. In place of sodium alginate may be used gums such as arabic, mesquite, karaya, locust bean, guar, and ammonium alginate ; or proteins such as casein, soya bean protein, zein, glue, gelatin, albumin. Other substitutes are carboxy methyl cellulose, sodium polyacrylate, a carboxy derivative of polystyrene, starch, dextrine, and pectines and their derivatives such as sodium pectate. Compatible mixtures of-colloids may be used. The coated surface is then treated a. room temperatures with a solution of a salt such as an acetate of a bi-valent metal, to which is added butanol, or ethanol, propanol, or methanol. Example: zinc acetate 25 parts by weight, water 72 parts, butanol 3 parts. The treatment with the salt solution in some cases may precede the application of the hydrophilic colloid, or the two treatments may be combined by a single application of a mixture of the two solutions. In place of zinc acetate, salts of other acids such as chlorides, sulphates, nitrates, formates, may be used, and the choice of bi-valent metals covers metals of Groups 1, 2, 4, 7 and 8 of the periodic table, namely barium, cadmium, calcium, cobalt, copper, iron, lead, magnesium, manganese, mercury, nickel, strontium, and zinc. Mixtures of salts may be used which are compatible, and in some cases incompatibility can be removed by the addition of a solvent such as ammonia. Example of combined colloid and bi-valent metal salt (parts by weight): hydrophilic colloid (water solution of guar gum) 8.95; water solution of formaldehyde 1,75; silica aquasol 1.33; water solution of zinc acetate 33.40; butanol 1.50; dye (Victoria Green) 3.65. The hydrophilic material used in the combined solution may in addition to those mentioned above comprise hydroxy ethyl cellulose, polyvinyl alcohol, mannitol, sorbitol, sucrose, invert sugar, corn syrup, mannose. In making printing-surfaces for giving a small number of impressions a cheaper paper is used omitting the casein-formaldehyde size, and the melamineformaldehyde resin. The amount of casein in the base coating is increased. In making the surfaces for a long run (5000 or more copies) they are made to have additional resistance to water penetration, and may have a base coat composed of (1) 100 parts polyvinyl butyral; 40 parts butyl ricinoleate; 5 parts soap- 15 parts by weight of mixture; (2) clay 15 parts ; (3) water 25 parts. Other water barrier coatings include urea formaldehyde resin, polyvinyl chloride, polymerized vinylidene chloride, styrene polymers, acrylates, elastomer type resins, or mixtures of these. The printing- surfaces may be treated by the rubbing process described in Specification 633,746.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74713847A | 1947-05-09 | 1947-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB633747A true GB633747A (en) | 1949-12-19 |
Family
ID=25003797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2343147A Expired GB633747A (en) | 1947-05-09 | 1947-08-25 | Improvements in or relating to paper base planographic printing plates |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE476486A (en) |
DE (1) | DE882998C (en) |
FR (1) | FR953589A (en) |
GB (1) | GB633747A (en) |
NL (1) | NL69492C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3107169A (en) * | 1958-12-18 | 1963-10-15 | Bruning Charles Co Inc | Processes of producing lithographic electrostatic printing plates |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL83171C (en) * | 1952-11-29 | |||
DE1032761B (en) * | 1953-04-17 | 1958-06-26 | Warren S D Co | Process for the production of a planographic printing film with a paper backing |
NL93863C (en) * | 1953-08-17 | |||
NL93864C (en) * | 1953-09-16 | |||
BE540225A (en) * | 1954-08-20 | |||
DE974162C (en) * | 1955-08-30 | 1960-09-29 | Rca Corp | Process for the production of lithographic printing plates by the electrostatic process |
DE1194879B (en) * | 1957-02-16 | 1965-06-16 | Eastman Kodak Co | Process for making lithographic printing plates |
DE1199789B (en) * | 1958-11-24 | 1965-09-02 | Oxford Paper Company | Lithographic printing plate for flat printing processes |
DE1212117B (en) * | 1958-12-03 | 1966-03-10 | Int Paper Co | Method of making a lithographic planographic printing sheet |
BE591936A (en) * | 1959-06-18 | |||
FR2956854B1 (en) | 2010-03-01 | 2012-08-17 | Snecma | DEVICE FOR CONTROLLING THE ORIENTATION OF BLOWER BLADES OF A COUNTERPROOF TURBOPROPULSOR. |
-
0
- BE BE476486D patent/BE476486A/xx unknown
- NL NL69492D patent/NL69492C/xx active
-
1947
- 1947-08-25 GB GB2343147A patent/GB633747A/en not_active Expired
- 1947-09-29 FR FR953589D patent/FR953589A/en not_active Expired
-
1950
- 1950-10-03 DE DEW4191A patent/DE882998C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3107169A (en) * | 1958-12-18 | 1963-10-15 | Bruning Charles Co Inc | Processes of producing lithographic electrostatic printing plates |
Also Published As
Publication number | Publication date |
---|---|
BE476486A (en) | |
DE882998C (en) | 1953-07-13 |
FR953589A (en) | 1949-12-08 |
NL69492C (en) |
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