Poor or spotty release of ink by pad in Pad Printing Machine?

Incomplete or spotty deposit of ink by pad is referred to as “splitting.” It plays a minor role in a continuously
running process. The problem only arises when cycle times fluctuate or after short breaks. The pad deposits
the dried ink all at one time, producing an inconsistent image. Using fast thinners will decrease ink build-up
and improve ink deposition.

Problem Solution
1. Dried out on pad. 1. Use slower thinner.
2. Too wet on pad, not tacky. 2. Use faster thinner.
Problem Solution
1. Insufficient etching depth. 1. Produce new cliche with greater etching depth.
2. Etched too deeply. 2. Produce new cliche with shallower etching depth.
3. Wrong screen ruling. 3. Use new cliche with different fineness of halftone screen.
Problem Solution
1. Wrong shape pad. 1. Use more tapered pad shape.
2. Surface roughened. 2. Replace pad.
Problem Solution
1. Soiled surface (grease, oil, perspiration, mold release agents..). 1. Pre-clean objects.
2. Surface insufficiently pre-treated (polyolefines). 2. Check pre-treatment, repeat as required.
Problem Solution
1. Print speed setting too slow. 1. Maintain uniform cycle time.
2. High ambient (room) temperature. 2. Optimal room temperature is 18 °C to 20 °C