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3 SUPPLEMENTARY INFORMATION
3.1 USE OF DOLLY PLUGS
Particularly in the case of low viscosity adhesives it is advisable to place a nylon plug in the centre of the
dolly before gluing it to the surface. This dolly plug (Figure 3) stops glue going up the centre of the dolly,
which can impede the pin and prevent the test being carried out properly. Careful cleaning of the centre hole
increases the adhesion values for tests on a given coating.
Figure 3. Dolly plug
To use the dolly plug:
1. Place the dolly plug through the centre hole on the dolly so that the tip protrudes just below the test
surface.
2. Apply the adhesive to the dolly test surface (see section 2.1) taking care not to get adhesive on the
plug.
3. Press the dolly and dolly plug onto the sample area for about 10 seconds.
4. Remove the dolly plug from the centre of the dolly and wipe the end clean using tissue soaked in a
suitable solvent. If the dolly plug becomes stuck to the dolly, use pliers to remove it.
5. Complete the test as described in sections 2.2 to 2.5.
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