Thiết bị kiểm tra thời gian khô
The Drying Time Recorder, Model 504, automatically determines and registers the
drying behaviour of paints and similar coatings.
Chi tiết sản phẩm
Design and Function
The instrument consists of a metal body with a cover plate. This plate serves as a platform for holding 6 glass strips measuring 300 x 25 mm
onto which the coatings are applied. The six testing needles are fixed in a carrier device made of steel.
The on/off switch and the control button for adjusting the running time (6, 12 or 24 hours) are located on one side. The instrument features
three time scales which correspond to the respective speeds.
The following track definitions conform to the degree of dryness of the coating:
♦ No track Coating material runs together behind the needle
♦ Continuous track No flow of coating material
♦ Rhombic track Incipient surface dryness
♦ Continuous track On the surface Incipient through-dryness
♦ Interrupted track Incipient non-stickiness
♦ No track Incipient handling fastness
To determine the time of each transitional point the carrier device with the test needles is moved back by hand and the needles placed on the
appropriate point. The relevant time can then be read off on the time scale.