Common Problems with Rubber Stamps: Blurred or yellowed ink How to solve them

The material of rubber is prone to problems such as blurred or yellowed lettering, which affects the appearance of the product and the effectiveness of the labeling.Starting from the actual situation, it analyzes the root of the problem and provides targeted solutions, covering equipment adjustment, material selection, and daily maintenance techniques, to help users efficiently resolve common problems in rubber marking.

Why is it that rubber stamps always get it wrong?

Many of my friends have told me that when they mark rubber products, the letters are often not clear enough, the color is yellowish, or the letters just become a mess after a few days.In fact, most of these problems have to do with the characteristics of the materials, the parameters of the equipment, and the habits of the operators.Now we'll talk about how to avoid these "pits.

These are the three main causes of blurred handwriting.

The temperature wasn't right.

Rubber is particularly sensitive to temperature.If the power is too high, it will burn the surface, and if it is too low, it won't go deep enough.For soft plastics like silicon rubber, it is suggested that you first test using scraps, to find the point at which the ink will show up but not smoke.

The surface treatment was not adequate.

The surface of rubber is usually covered with mold release agents or oil, and direct printing would certainly "not hold color.After wiping them clean with alcohol, blow them for 30 seconds with a hair dryer (don't blow in one place for too long). This will greatly improve adhesion.

The font is unreasonable.

In addition, delicate designs or intricate patterns tend to smear easily on rubber.Choose a bold sans-serif font, and leave at least 0.3 mm between lines. Don't cram everything together.

The yellow tag's response.

Change the type of laser.

UV lasers are more suitable for light-colored rubber than CO2 lasers, as they produce less heat and avoid oxidation and yellowing caused by high temperatures.If the budget is limited, try a combination of lower power output and increased marking speed.

Protect the air.

Blowing nitrogen or compressed air into the laser marking area can lower the temperature and prevent the material surface from reacting chemically with oxygen.If you want to make your own, you can use a small air pump and a thin tube.

Don't be lazy about post-processing.

After the pattern is completed, the surface is wiped with cold water, which fixes the colors.If the soles are dark rubber, it is recommended that they be treated with a clear protective oil (one that is not silicone-based), which will help prevent yellowing and also increase the soles 'resistance to wear.

Tips for everyday maintenance.

• Clean the laser lens once a week. Dust will affect the laser's focusing ability.

Do not store rubber products for too long, and use them within three months after opening.

• In the rainy season, dry the materials in a dryer before stamping them.

• Test each batch of material before putting them on the production line.

By following these steps, most of the problems in labeling can be solved.If the problem persists, it may be that the equipment is aging or there is a problem with the materials. In this case it is recommended to contact the supplier to conduct a professional inspection.