Why doesn’t my ink stick?

Reason 1: Are you using the right ink for your substrate?

Inks are formulated with specific substrates in mind, meaning that different types of inks are tailored to work effectively with specific materials. For example, Inkcups provides a range of ten different inks for pad printing. The CG Series ink is specifically formulated for glass, ceramics, and metal, while the PN Series ink is designed for untreated polypropylene, and the SB Series ink is suitable for apparel and rubber. The selection of the appropriate ink is crucial for achieving good adhesion. Contact us if you need further help finding the best ink for your substrate.

Reason 2: Contamination may play a role in the issue.

The presence of substances such as oils, dust, or mold on the substrate can act as barriers when applying the ink. To put it simply, oils from handling the product with bare hands could be causing the problem.

Reason 3: Does your product require pre-treatment?

The surface energy of the material you are printing on may be too low, resulting in poor ink adhesion. Implementing a pre-treatment process can modify the surface tension of the substrate, making it more conducive for the ink to adhere to. When printing on glass, it is a common practice to incorporate a pre-treatment regime. To determine the specific requirements for your printing needs, it is advisable to consult with an Inkcups technician who can assist you in devising a personalized plan.