SILPLAY 184/28 silicone rubber for food molds

SILPLAY 184/28 is a two-component silicone rubber (the first on the market since 1996) with a platinum catalyst.

Classified as non-hazardous and certified suitable for making non-stick molds for chocolate, liquid sugar and marzipan pursuant to the Ministerial Decree of 21 March 1973.

The analysis certificate prepared by an authorized laboratory is available.

This product, after the union of the two components, vulcanizes at room temperature without the need to be baked in the oven and without other precautions.

It allows you to create molds in your laboratory in a simple and safe way, allowing you to create any shape and in any size, starting from existing objects or specially modeled with waxes, plasters, clay and wax-based plasticine.

Advantages:

• Perfect reproduction of even the smallest details
• Absolute non-toxicity certified according to current legislation
• High elasticity that allows you to demould pieces with strong undercut
• Total non-stick against any product except silicones

The molds obtained cannot be used in the oven but only at room temperature with the previously indicated foods.

The molds obtained must be left to mature for 48 hours at room temperature (20-25 ° C) before being used.

Processing tips:

The optimal processing conditions are obtained at 25 ° C. Higher temperatures reduce the potlife and the hardening and curing time.

Conversely, lower temperatures increase the two times. Use at temperatures is not recommended

• below 15 ° C under penalty of a worsening of the mechanical properties and chemical resistance of the vulcanized product
• above 45 ° C to avoid higher linear shrinkage

Gather the two components in a container with a wide opening and smooth walls and bottom, mix with a narrow and elongated blade spatula for about a minute, taking care to scrape the walls and the bottom of the container well, in order to obtain a homogeneous mixture throughout the mass above 45 ° C to avoid higher linear shrinkage

Mix slowly to avoid excessive incorporation of air bubbles.

Before pouring, it is advisable to let the mixture rest for at least 10 minutes to allow deaeration.

Pour the rubber slowly to the side of the model to be reproduced, previously positioned inside a container: in this way the model will be gradually covered without the risk of remaining air bubbles.

In correspondence with the protruding details and undercuts, use a small brush to facilitate the escape of the air bubbles that tend to form in these points.

Fill the mold to cover the model abundantly.
To keep the mold efficient and extend its life when used to obtain many consecutive copies, it is advisable to store it in non-absorbent containers and in the dark.

At the end of the work it is not necessary to wash the containers and the rubber-smeared spatulas; after vulcanization it detaches easily from tools, leaving the surfaces clean and without residues.

Change in viscosity

It is not possible to reduce the viscosity by adding silicone oils: the validity of the food certification would be lost.

Modification of thixotropy

There are no additives available that allow the modification of thixotropy (for vertical brush / spatula applications) without losing the validity of the certification of suitability for food contact.

Degassing

The catalyzed compound can be degassed under vacuum. This allows to eliminate the air bubbles that could form in the finished product.

Generally degassing is done under vacuum from 30 to 50 mbar for about fifteen minutes by carrying out two successive depressions.

The choice of a container with a high diameter / height ratio allows to accelerate the degassing operation.

WARNINGS FOR CORRECT USE

SILPLAY 184/30 silicone rubber is of the addition type.

These rubbers, unlike those for condensation, require particular attention as they do not tolerate some substances that inhibit their catalysis.

In the first place, never use tools, containers or spatulas that have been used with normal condensation rubbers: the two types are absolutely incompatible and the slightest contact is capable of preventing catalysis.

It is also necessary to make sure that the masters used as a model do not contain even a minimum quantity
– trace of rubbers and catalysts of the condensation type,
– all products that contain even minimal traces of sulfur and derivatives,
– polineoprene glues,
– polyester-based resin, fillers and mastics,
– non-waxy based plasticine and glass putty,
– PVC,
– tin and heavy metals in ionic form,
– amines
– natural and synthetic rubber.

So if the model contains these substances or is in one of these materials, it must be covered with a veil of carnauba wax to isolate the master from the rubber.