pH Testing Pen the “dot-shaped” adhesive coat makes

the “dot-shaped” adhesive coat makes the material easier to handle

To fit: 4 x 5"

as well as mounting photographs and labels

lining boxes and drawers

pH Testing Pen the “dot-shaped” adhesive coat makesWith 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