Acces­sories: Extra Top Plates

Due to fric­tion, top plates wear and should be replaced peri­od­i­cally.

Pfund Cryp­tome­ter

Wet Hid­ing Power Test

The cryp­tome­ter is a wedge type film appli­ca­tor, which deter­mines the wet hid­ing power of a coat­ing within a few min­utes.

• Quickly and reli­ably checks wet hid­ing power
• Deter­mines thick­ness needed for com­plete hid­ing
• Gives esti­mate of cov­er­age in square feet per gal­lon
• Can be used with any color of coat­ing
• Small sam­ple size (3 - 5 mls.) makes this ideal for QC tests

It con­sists of two plates of glass separated at a fixed angle. The bot­tom glass plate is engraved with a scale, and the top plate is trans­par­ent.

Pro­ce­dure
A coat­ing is placed into the open area between the plates, form­ing a wedge shaped film (Fig. 1). By slid­ing the top plate back and forth, a sharp line of demar­ca­tion alter­na­tively appears and dis­ap­pears (Fig. 2). The point at which the demar­ca­tion line appears is read on the engraved scale (Fig. 3). These scale read­ings are eas­ily con­verted into thick­ness in mils, or cov­er­age in square feet per gal­lon using the table fur­nished with the instru­ment.

Comes com­plete with:
Base Plate; Top Plate, wedge con­s­tant 0.002
Top Plate, wedge con­s­tant 0.007

Fig­ure 1

Fig­ure 2

Fig­ure 3