How to distinguish the roll direction (inner carbon, outer carbon) of wax based carbon ribbon?

The rolling direction of wax based carbon ribbon, namely inner carbon and outer carbon, can be distinguished by the following methods:

1、 Observation and touch method

Observe the appearance:

Inner carbon ribbon: When wrapped, the ink side comes into contact with the shaft core, so from the appearance, the color near the shaft core may be darker or have ink marks.

Outer carbon ribbon: When wrapped, the ink free side is in contact with the shaft core, and the ink side is on the outside of the roll, so the roll itself looks relatively clean and has no ink marks.

Touch texture:

The side with ink usually feels rougher to the touch because the ink layer increases the friction on the surface.

The ink free side is smoother and has a delicate touch.

2、 Adhesive label testing method

Preparation materials: A sticky label paper.

Implementation testing:

Gently stick the adhesive label paper onto one side of the carbon tape.

After tearing off the label paper, observe whether there is ink stuck on the label paper.

If there is ink on the label paper, then that side is the one with ink.

Based on the position of the ink surface (inside or outside the roll), it can be determined whether the carbon ribbon is inner carbon or outer carbon.

3、 White paper scratch test method

Preparation materials: a piece of white paper and a holder or pointed object (such as a pen tip).

Implementation testing:

Contact one side of the carbon ribbon with white paper.

Gently swipe the other side of the carbon ribbon using a bracket or pointed object.

Observe whether there are ink marks left on the white paper.

If there are traces left, then the surface is the one with ink.

Similarly, the roll direction of the carbon ribbon is determined based on the position of the ink surface.

4、 Reference product description and labeling

View product packaging:

The packaging of carbon ribbon products usually indicates the type, specifications, and roll direction of the carbon ribbon.

By carefully examining the labels and instructions on the packaging, one can intuitively understand the roll direction of the carbon ribbon.

Consulting suppliers:

If you have any questions or uncertainties about the information on the product packaging, you can contact the supplier or manufacturer of the carbon ribbon for consultation.

They will provide professional answers and assistance to ensure that you can choose and use carbon ribbons correctly.

In summary, through observation and touch, adhesive label testing, white paper scratch testing, and reference to product instructions and labeling, the roll direction (inner carbon, outer carbon) of wax based carbon tape can be accurately distinguished. In practical operation, appropriate methods can be selected for testing according to specific situations.