Researching of the physical and chemical properties of offset printing inks is ve ry important for printing process optimization. Three colour inks, commonly used for newspaper and magazine printing, are selected for the research. Their optical cha rac teristic is studied -the transparency applying five fielded gray scale, ink print resistance to the contact of water, ethyl alcohol, alkali and acid. The inks density, change of flow border depending on idle standing time are determined. The anomaly of viscosity is calculated. In addition, the assessment of colour offset printing inks is obtained. Basing on researched physical and chemical properties of colour offset printing inks, diagrams, tables with obtained data are constructed, determining their interconnection and in fluen ce on the quality of technological process of high grade prints production.
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