Page 116 - 20250602 EEA QM Edition 6.0

Quality Requirements Edition 6.0 European Enamel Association

larger surface within small space, the test sheet is bent to give a cylinder. The results Method of operation:
by this are more accurate.
A metal cylinder is placed in time, no real statement can be made about the application

behaviour of enamel slips. It has been tried again and again to change the design of
The application weight and the observations made of the flow, can be, in a limited outflow cups, enabling them for mud processing, but non representative or
way, the criteria of the application behaviour of the slip. reproducible results have been achieved.

2. Enamel slip gauge
Helpful information can be achieved with regard to the judgement of fluidity of muds
The PEMCO enamel slip gauge has been developed in order to characterize the
in closed pipes (pump feeding).
consistency of the slip quickly, without weighing. The device allows comparisons of
slips of the same type and consists of a blade of stainless steel, sized 27 x 4 cm with
ten holes with steadily increasing diameters from 5 to 14 mm. 4. Outflow cup

Method of operation: Viscosity cups, also called DIN or Ford cups, are suitable for lower viscosities and not
for highly viscous substances. The most accurate results are achieved with fluids within
Use the gauge to stir the slip under test, then lift out the blade vertically with uniform
the range complying with Newton’s law. Nevertheless, when applicable, the cups may
velocity. By draining the slip off the blade, the holes open up, incipient with the lowest,
provide interesting comparisons between slurries on how they flow through pipes, pump
the biggest. The number of open holes can be of information about the application
and spraying hoses.
behaviour.
The test method is among other things affected by varied manual draw-out velocities.

3. Slump test

The slump test belongs to the more costly but also more exacting test methods. The
spread of a fixed volume of slip on a panel scored with concentric rings is measured.
The test provides information about viscosity and thixotropy. Both properties are
covered by one sum in which the spreading of watery slips is predominantly affected
by its viscosity. An existing thixotropy affects the test results of viscous enamel slips.

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