Linen tester

A linen tester is a strong magnifier with a measuring scale and a built-in stand.

The linen tester was invented to check the quality of woven fabrics.

It is used in the textile industry to measure the number of weft and warp threads within a certain area of fabric.

Today, it is more commonly used to measure the line width and check the registration of color separations in the field of printing and publishing.

It consists of a strong magnifier and a glass disc which has a measuring scale engraved in it.