Lithography ink of low-viscosity type

Abstract

Abstract PURPOSE:The titled lithography ink having constant viscosity, flow degree, and small reduction in flow properties by admixture of water, obtained by using gilsonite as a main component of a vehicle resin, dispersing or dissolving it in an imparater for adaptability to lithography. CONSTITUTION:Gilsonite (most preferably 7-8wt%, having 130-170 deg.C softening point) is used as a main component of a vehicle, resin, and it is dissolved or dissolved in a mineral or vegetable oil. The dispersion or solution is blended with preferably 0.01-0.1wt% surface active agent (preferably nonionic or ampholytic surface active agent) as an imparter for adaptability to lithography and a colorant, to give the desired ink having 5-100 poise (preferably 15-30 poise) viscosity at 25 deg.C, and >=70mm. (preferably 70-90mm.) flow degree (JIS K-5702). EFFECT:Having no phenomena of emulsification during printing, causing no partial light and shade of ink on the surface of printed paper. USE:Useful for a rotary press machine of lithography feeding ink by a mesh roll.

Inventors

• 👤 Hidejiro Yoshimoto
• 👤 吉本　秀治郎
• 👤 Rokuro Higuchi
• 👤 樋口　録郎
• 👤 Koichi Matsumura
• 👤 松村　興一
• 👤 Hiroshi Masuda
• 👤 博 増田
• 👤 Yoshiro Ogawa
• 👤 小川　良郎

Bibliographic Details