Thanks to the vacuum, air goes out from the narrow crack lines of stone where resin penetrates more easily and deeply thus causing the slabs to be better restored.Vacuum resin-treated slabs get a better polishing since each single crack line, even the narrowest, is filled up with resin.Furthermore, cracks saturated with resin prevent any seepage of humidity entering from the floor.

Breton patented and realised the plants for the vacuum resin-treating by spreading the resin on the surface of marble and/or granite slabs (without immersion in resin), and developed in its R&D Dept. both the formulation of the resins to be used and the parameters involved in the process.Breton transfers the complete Know-How to operate the plant and use the resins to its customers, and trains their operators as well.

In its R&D Dept., Breton has developed the most suitable formulations of resin and analysed all the parameters involved in the resin-treating process.After having been suitably mixed with additives according to the desired final characteristics (penetration degree, adhesion degree, colour toning degree and preservation of the characteristics in the long run, UV-resistance, etc.), several types of resin were tested (epoxy, acrylic and polyester resins) and their advantages and disadvantages in terms of output and operating costs were crosschecked.

On request, Breton supplies the unit for the automatic preparation of the resin as well as the unit for the automatic spreading of resin on the slab surface.

Depending on the requirements, slabs move along the automated resin-treating line while they are held up by special, rigid steel supports.Breton suggests the most suitable catalysis techniques according to the type of resin used, the material to be resin-treated (marble or granite) and the production capacity.

As to the static catalysis of the resin-treated slabs, Breton developed special vertical multi-decker kilns with hot-air circulation which ensure an ideal catalysis of the slabs housed in the kiln.

The catalysis of marble slabs treated with polyester resin may also be performed in line, while they return to the loading point and move on a conveyor placed under the processing line along its longitudinal axis, with no need of kilns.