B K DRYING TIME RECORDER

6 -12 - 24 Hour Speeds

CONFORMS TO ASTM D 5895

Measures and Records the Drying Time of Surface Coatings, etc.

BK Drying Time Recorder
Item No. DT-BK3

The 3-Speed Drying Recorder defines stages in the drying process as:

• The first stage is a pear-shaped impression corresponding to the time taken for evaporation of solvent.
• The second stage is the cutting of a continuous track, corresponding to a sol-gel transition.
• The third stage is an interrupted track corresponding to the surface-dry time.
• A fourth stage is where the needle no longer penetrates the film, corresponding to the final drying time.

A typical white enamel would have a drying time expressed as follows:

1-1/4 ----3-1/2----4 (hours)

Although all stages recorded are significant it is often sufficient to express a drying time in terms of set-time and hard-dry time, thus: 1-1/4 - 4 (hours). Brass weights, each weighing 5 g, may be used to apply greater pressure on the needles and thus record the through-drying properties of alkyds, varnishes and paints. The 3-SPEED BK DRYING RECORDER will give useful information about the gelation times of many two component surface coating materials and about the properties of such films.

THE MICKLE RUB TESTER

THE MICKLE INK PROOFER

The Mickle Proofer design is widely used by ink manufacturers and printers as an essential quality control tool. The 200 -x. 50mm prints produced are used for colour checking as well as measurement of density, penetration, set-off and drying. They may also be used in conjunction with the Mickle Rub Tester for rub and abrasion testing. The Mickle Proofer comprises one Inker and one Printer unit which are available as separate items.

The inked up Print disc is transferred from the Inker unit to an arm above a motor driven impression roller on the Printer unit. The substrate to be printed is then placed between the impression roller and the print disc on the printing ledge. A printing pressure of up to 1000N may be applied to the Print disc by means of a sliding weight on a graduated bar. Pressing and releasing the print switch provides one revolution of the Print disc.