In the use of covering power paper industry users, the most used is the upper black and lower white shape of the covering force paper, Bentworth OTZ 2DX covering power test paper is black and white in half of this hiding force test paper, the surface is covered with varnish, suitable for paint, plastic, ink, hardware, printing, varnish and other industry users, the applicability is relatively wide.
| Model | color | Dimensions (mm) | type | Quantity per box (sheets) | brand |
| 2A | Black and white halves (top black and bottom white) | 194x289 (7-5/8x11-3/8 inches) | Cover varnish | 250 | LEADER |
| 2DX | 98x152 (3-7/8x6 inches) | 500 (0.5mm/sheet) |
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.


2DX 2A