Restoration blasting

For the blasting of delicate substrates very fine abrasive must be used with a low blasting pressure. Also, a constant metered quantity and flow of abrasive is of great importance for the best uniform result. Gritco has developed special blastpots for this.

When using very fine abrasives, dry compressed air is an absolute must. This prevents blockages in the blast pot and guarantees a constant metered flow. A cooler, possibly extended with filters, gives this dry air.

The user must obviously be well protected against rebounding abrasive and dust. Because in restoration very low blasting pressures are used a blasting helmet is not immediately required. An airhood also provides an adequate protection.

The choice depends on the type of material of the object and the desired treatment. On this basis, it is determined which type of abrasive should be used. The surface result depends on the grain size of the abrasive. In general one-pass abrasives will be selected with grain sizes between 0.05 and 0.3 mm.

The simple fact, "more power = more work" also applies to the last part of the blasting chain, the compressor. With more air capacity you can work faster. But for restoration, precision is just as important and therefore smaller nozzles and low blasting pressures are used. The required compressor capacity therefore is often between 500 and 3000 l/min. More info about the size of compressor here.