Drying time - Senze-Instruments

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Drying time

Coatings & Industry > Physical properties > Drying Time
Drying Time Tester Model 415

For measuring the degree of dryness of coatings
DIN 53 150   -  DIN EN ISO 1517

Purpose and Application
The Drying Time Tester, Model 415, is intended for the determination of the degree of dryness of coatings in accordance with DIN 53 150 (modified Bandow-Wolff method).

Technical Data
Dimensions: Width: approx. 150 mm
Depth: approx. 300 mm
Height: approx. 440 mm
Net weight: approx. 4.5 kg

Order Information
Ref 0093.01.31         Drying Time Tester, Model 415
Included in scope of delivery:
♦ Stand
♦ Individual weight for load of 20 g
♦ Individual weight for load of 200 g
♦ 2 soft rubber disks of 22 mm ∅
♦ 100 paper disks of 26 mm ∅
♦ Ballotini dispenser
♦ 50 g glass beads ("ballotini"), ∅ 125 - 250 μm, in compliance with DIN EN ISO 1517
Design and Function

The Drying Time Tester, Model 415, consists of an light alloy cylinder which is fixed to a stand. The pressure spring integrated in the cylinder facilitates a plunger force of up to 250 N which is applied to the coating in a perpendicular motion by way of a lever mechanism.
The clearance between the plunger and the base table can be set to the thickness of the test panel by adjusting the lever bracket accordingly.
Loading weights (20 g and 200 g) with a diameter of 24 mm are included in the scope of delivery for standardized loads of less than 2 kg (20 N).
To achieve a uniform distribution of the contact pressure a cylindrical soft rubber disk with a diameter of 22 mm, a thickness of (5 ± 0.5) mm and a hardness of (50 ± 5) IRHD in accordance with DIN ISO 48, is used.

Conducting the Test
The test sequences vary in accordance with the dryness degree as follows:
Dryness degree 1
The coating is covered with ballotini which are subsequently removed using a fine brush.
Dryness degrees 2 and 3
First a paper disk is placed onto the coating, then a soft rubber disk. Loads of 20 g and 200 g are applied by adding one of the individual weights provided (load duration 60 s).
Dryness degrees 4 to 7
The test panel is placed on the stand base with the coating upward and successively covered with a paper disk and a soft rubber disk. The required load (2 kg or 20 kg) corresponding to a plunger force of 20 N or 200 N, is produced using lever pressure and maintained for approx. 60 s.

Evaluation of Test
After removing the load, the coating is evaluated in accordance with the following table.
Through-DryTester Model 416

ISO 9117  -  EN 29117

Purpose and Application
This instrument is designed for testing the through-dry state of paints, lacquers and similar coatings in accordance with the standards ISO 9117and EN 29117.

Principle of Test
A test plunger faced with nylon fabric and loaded with a defined weight is lowered onto the test surface for a limited period of time and
then turned through 90°.
The resulting effect on the coating is evaluated after lifting the test plunger.

Technical Data
Dimensions: Length: approx. 150 mm
Width: approx. 300 mm
Height: approx. 305 mm
Weight, nett: approx. 4.5 kg
Design and Function

The testing instrument consists of a specimen table holding a support stand that guides a loaded weight vertically.
A test plunger is connected to the loaded weight via a ball-and-socket joint (total weight 1500 g). A rubber sheet (hardness 50 IRHD acc. to ISO 48) is stuck to the front end of the test head and a monofil nylon fabric (thread diameter 0.12 mm, size 100 x 100 mm) is attached to the test head and retained by an O-ring. Before each test a fresh piece of nylon fabric should be attached to the test head.
The testing instrument must be levelled horizontally before it is used. For this purpose the box level supplied with the instrument, is placed onto the specimen table and then the instrument is levelled with the help of the adjustable feet.
After a defined drying time the test head is lowered onto the specimen and thus the nylon fabric is pressed onto the test surface
After 10 s the test head is turned through 90° and after another 2 s it is lifted.
If no marks or damages can be observed on the test surface the through-dry state has been achieved. Otherwise the test must be repeated after an appropriate period of time (please refer to the standards).
Ref 0185.01.31      Through-Dry Tester, Model 416
The scope of supply includes:
♦ Box level
♦ 100 pcs of nylon fabrics (100 x 100 mm)
Drying Time Recorder Model 504

Precise Recording of the drying Properties of Paints and Similar Coatings

Purpose and Application
The Drying Time Recorder, Model 504, automatically determines and registers the drying behaviour of paints and similar coatings.
Test Principle A needle slides over the coating film at a defined speed. The track produced by the needle varies according to the degree of dryness.
The various drying stages are defined by calculating the time and track characteristics of the film under investigation.
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 trackon 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.
Accessories
We recommend using the ERICHSEN Quadruple Film Applicator, Model 360, to produce an even, 13 mm wide coating film on the supplied glass strips.
The addition of brass weights increases the tracking force of the needles so that the drying properties of even particularly resistant paints and varnishes can be determined.

Technical Data
Dimensions: Height: 83 mm
Width: 470 mm
Depth : 240 mm
Net weight: approx. 5.5 kg
Voltage: 230 V AC / 50 Hz
Running length: 300 mm
Running time: alternatively 6, 12 or 24 h.
(other running times on request)
Ref 0504.01.51  Drying Time Recorder, Model 504
Scope of delivery includes:
♦ 6 glass strips
♦ 6 test needles
♦ 1 mains cable
♦ 1 operating manual

Accessories / Spares
Ref 0046.01.31    Quadruple Film Applicator, Model 360, for film width of 13 mm
Ref 0504.03.53    Brass weights (5 g each) for test needles, 6 pieces
Ref 0504.01.53    Spare glass strips, 12 pieces
Ref 0504.02.53    Spare test needles, 12 pieces
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