The chlorophenol red indicator solution in the pen will turn purple on any paper with a pH of 6.8 and above.
Lineco pH Testing Pen - ideal for crafts for checking acidity in paper and card
Lineco pH Testing Pen For Paper Acids
Heat Erase Pen Fabric Marking Pen & 4 Color Heat Erasable Pen Refills for Crafts
NAVY Frixion Pen, ideal for marking fabric and easily remove with heat.
BLACK Frixion Pen, ideal for marking fabric and easily remove with heat.
Pergamano GEL PEN Ideal for tracing patterns on Parchment Paper Choose ur colour
