pH Testing Pen To fit: 4 x 5"

To fit: 4 x 5"

this can be reduced by combing and manipulating the brush head before use

Sheet size: 700 x 1000mm

as well as mounting photographs and labels

Size: Small File Box (TBOX11)

pH Testing Pen To fit: 4 x 5"With a simple swipe of this pH testing pen you can determine whether the paper and board you are using is acidic. This easy, convenient method allows you to distinguish the difference between safe (neutral or alkaline) paper and board and acidic materials. Easy to use, simply draw a small line on the material you wish to test. The chlorophenol red indicator solution in the pen will turn purple on any paper with a pH of 6. 8 and above. A clear or