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SUGGESTED SPECIFICATION FOR
THE PROTECTIVE COATING OF DISHWASHER BASKETS

TALISMAN 10

 A)                GENERAL

The wire dishwasher rack must conform to the drawings. Parallel wires should be no less than 10mm apart. 

All cut wires should be free of sharp edges and weld free of splatter prior to cleaning.

B)                APPEARANCE

The colour of the coating shall conform to the current standard. 

The coating must be free of contamination and foreign bodies. The coating should not show signs of damage, scarring, roughness or discolouration.

C)                THICKNESS

The thickness of the coating should be as evenly distributed as possible and be no less than 350 µm. 300 µm thickness is permitted on the extremities of the wire only.

The maximum thickness shall be no more than 750 µm.

D)                MATERIAL CHARACTERISTICS

The material should be non-hazardous and conform to the requirements of EU Directive 90/1278 for food contact.

E)                PROPERTIES OF THE COATING

a)     General

b)     Mechanical Resistance

All tests to be carried out on coated wires of minimum of 4mm wire thickness.

Either:

The coated wire, placed on a solid support, is subjected to an impact to ISO 4532 at 20N. The coating may be deformed but not be perforated through to the metal.

Or:

The coated wire is subjected to 300 drops of a 350 gramme plate from a height of 75mm. The coating must not rupture to the metal.

c)     Flexibility

Either:

Grip a tine 75mm from the weld and deflect the wire by 45° at 23°C. The weld shall not break and the coating shall not crack.

Or:

Bend a 150 mm (or as long as possible) section of the thinnest coated wire around a 7mm mandrel at uniform speed to an angle of 180°. There shall be no cracking of the coating.

F)                 CHEMICAL RESISTANCE

The coating must be resistant to the chemicals used in the dishwasher as follows:

G)                STAIN RESISTANCE

The test pieces are then washed in de-ionised water or in soap and water or washed with a piece of cotton soaked in denatured alcohol.

The component is then examined for stains or any other defects that might affect its use.

H)                LIFE TEST

After conditioning for a minimum of 36 hours after coating the finished coated component is subjected to 3000 cycles in a dishwasher, typically as follows:

½ nominal washing load 

70 °C 

Break between washes – minimum 10 minutes 

Foodstuffs to be added periodically (minimum 300 time during test): 

E.g.           In 5 litres of water

                              Coloured malt vinegar at 6%           10ml

                              Wine vinegar                                     10ml

                              Groundnut oil                                    10ml

                              Olive oil                                              10ml

                              Lard                                                    10g

                              ½ salt butter                                      10g

                              Washing powder                              10g

                              Tea-spoon of mustard                     1

At the end of the cycles the coating must be free of defects and show no significant signs of discolouration or excessive food leftovers.

Note:

This specification is for guidance and information only. Customers should ensure that the products they are using comply with their own specifications and are suitable for use.

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14/08/02