Drying Time Recorder


BK/3 BK/6 BK/10

A reliable apparatus to test the drying time or gelation behaviour of many paints and coatings,

The drying time is calculated from the distance travelled, measured using a graduated rule along the edge, corresponding to the various stages observed on the trace.

Automatically stops at the end of travel.

A needle carrier holding six hemispherical ended needles travels the length of the six 305 x 25 mm test strips in 6, 12 or 24 hours.


◆ Simple maintenance & easy to clean.
◆ Evaporation of solvent: deep pear-shaped impression.
◆ Sol-gel transition: continuous track.
◆ Surface dry: interrupted track.
◆ Final dry time, the needle no longer penetrates the film.
◆ 240 V/50 Hz or 110 V/60 Hz*.

The BK 3 Speed Drying Recorder has been used widely in the coatings industry throughout the world for several decades.

BK3: 6 tracks, 3 selectable speeds: 6, 12 or 24 h.

The BK 6 and BK 10 Recorders have independently operating tracks allowing tests to be made at different start times. 

Pairs of tracks operate at the same speed, and a wide range of travel times are available. Travel times of 6, 12, 24 and 48 hours are all considered as standard.  A time scale on the front cover is graduated to suit the instrument’s drying time ranges. 

◆ Each pair of tracks has its own individual operating switch.
◆ BK6: 6 tracks, each pair of tracks is driven by an Independent motor
◆ BK10: 10 tracks, each pair of tracks is driven by an Independent motor

Supply with: Recorder, set of 6 (or 10) needles, pack of 6 (10) glass strips

Optional Accessories:

Hemispherical ended stainless steel needles.  BK/N (1 mm)
2mm ball ended stainless steel needles. BK/N (1 mm)
5mm PTFE ball ended needles for specialist applications BK/PTFE (5 mm)
Teflon coated needles for specialist applications (coated one end). BK/PTFE (5 mm)
5gram brass weights to increase test pressure BK3/BW
Glass test strips (pack of 12) BK/GS
25mm Paint cube film applicator in stainless steel with film width 16mm - 37 / 75um Gap Sizes 1103
Caster guide  for use in conjunction with the paint film applicator BK/CG

Other speeds are available to special order.

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Samriddhi International Inc.
405, New Sonal Ind Est.,
Building No.2, Link Road,
Near BMW Showroom,
Kach Pada, Malad (W),
Mumbai 400 064
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