engleski

Wetting of CtP offset plate as a function of developing process

Offset printing is a complex process where many parameters, such as fountain solution properties and plate making process greatly influence quality of the final product.Aim of this paper was to detrmine physical-chemical properties of two fountain solution types and their wetting properties on printing plates made in different process conditions. Obtained results show that pH value and contact angle decreases as volume added concentrate in fountain solution increases, while electrical conductivity enhances. measurements of the contact angle shoved that the increase of developing speed causes higher values of contact angle. This investigation showed that both of investigated parameters, fountain solution and developing process significantly influence wetting process, consequently printing quality.

offset printing plate fountain solution; electrical conductivity; pH value; contact angle

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