(19) |
 |
|
(11) |
EP 0 091 601 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
|
01.02.1984 Bulletin 1984/05 |
(43) |
Date of publication A2: |
|
19.10.1983 Bulletin 1983/42 |
(22) |
Date of filing: 28.03.1983 |
|
|
(84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI LU NL SE |
(30) |
Priority: |
29.03.1982 US 363098
|
(71) |
Applicant: UNION CARBIDE CORPORATION |
|
() |
|
(72) |
Inventors: |
|
- Burns, Richard Jude
()
- Smith, Donald Foss, Jr.
()
|
|
|
|
(54) |
An improved fountain solution |
(57) An improved fountain solution suitable for use in a lithographic offset printing
press which solution contains from about 0.5 to about 10 percent by volume of an isopropanol
replacement, and between 0.005 and about 1 percent by weight of a water-soluble/miscible
polymer selected from hydroxyethyl cellulose, hydroxypropyl cellulose, methylcellulose,
hydroxypropyl methylcellulose, hydroxybutyl methylcellulose, poly (ethylene oxide),
poly(acrylamide), poly(vinyl alcohol), guar gums, acid thickening polymers and chemically
modified gums. The fountain solution provides increased viscosity over current fountain
solutions which results in improved operating latitude and decrease of problems associated
with isopropanol replacements.