Only sand the clay carefully and polish it better

The sanding of the surfaces and the material clay do not really fit together. A polishing is usual in the so-called leather-hard drying status. On fired and glazed surfaces, light sanding may help in repainting or repairing. The glaze must not be removed down to the substrate.

Polish before the raw firing

In pottery, the dried clay can be polished before it is fired. After the raw firing you should refrain from grinding. The specific porous consistency of the material is substantially damaged in almost all cases. Theoretically, grinding with the highest quality diamond grinding heads is possible.

If larger bumps are removed and compensated in the leather-hard condition, a longer polishing is recommended, if necessary with moistening by a water spray bottle. For clay works that are already fired, mechanical smoothing is no longer possible.

Sand glazes only superficially

Glazes consist of several layers. As with human skin, the retention of the surface decreases with each layer loss. If glaze is to be sanded, the removal should concern only the upper layer if possible. Under no circumstances may be penetrated to the "naked" tone under the glaze.

Similar to drilling clay, every mechanical action and change places substantial stability at risk. If sanding is required, this risk can be reduced by manual labor. Electrically operated devices are usually not "sensitive" enough lead.

Smooth and shine by polishing

Clay is polished before the raw firing, also known as pre-shredded, to achieve gloss and smoothness of the surface. The ideal time is when the clay still looks moist but has already dried to a leather-hard finish. As a polishing tool, stones such as the semi-precious stone agate and very smooth pebbles are good.

Other possible polishing aids are metal spoons or plastic films wrapped around a carrier. Typical examples are cling films or shopping bags, which are stretched around a brush or disposable hand.

Tips & Tricks

In principle, you must assume that after firing your sound can not be changed. Therefore, it is necessary to influence the surface textures even at the stage of formation.

Artikelbild: Sarah121 / Shutterstock

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