Test liners
Tried and tested quality is underlined by the name test liner. At the same time emphasising that, in certain cases, test liners made out of 100% waste paper can be a good and a particularly economical alternative to kraft liners produced out of new fibres.
The various test liner types:
Normally one differentiates between three types of test liners (T1, T2, T3). The highest grade waste paper is used for T1 type, whereas with the other two types, waste paper of lesser grades is used. If the test liner is comprised of two layers, then usually a thicker carrier board would be used and couched with a higher grade surface layer.