Twards OTZ 10A Hiding Power Test PaperIt is a kind of domestic (CN) coating ink hiding power test cardboard, the surface is black and white grid shape, covered with varnish, with good permeation resistance, 10A and 10B are two different sizes, the surface shape is the same.
| Model | color | Dimensions (mm) | type | Quantity per box (sheets) | brand |
| 10A | One black and one white, black and white | 140x254 (5-1/2x10 inches) | Concealed varnish | 250 | LEADER |
| 10B | 194x289 (7-5/8x11-3/8 inches) | 250 |
Blocking force jam: Measure the hiding force with an instrument
Permeable cardboard: Used to evaluate the consistency of color and gloss of a voided surface
Visual assessment of hiding power:
- Comparison/coating rate jam
- Black and white grid/coating rate cardboard
Brush cardboard is used for informal brushing
Dedicated test jams for sag and leveling tests.


10A 10B