Production of lightning glass enables the creation of infinite number of shapes and forms of lampshades. It is only possible if the glassmakers are well-trained, versatile and creative. Due to exceptional staff and long-lasting traditions, we can create sophisticated patterns, even in small amounts, as well as offer helpful guidelines in order to improve already existing projects.

Lightning glass

There is a wide range of lampshades that can be included in the lightning glass category; beginning with all kinds of electric lamps and ending on chandeliers, gas and oil lamps.

Lightning glass is produced from colourless glass mass, and even more often from adulterated glass. Most of the products are tri-layer, hand-made and formed by the method of coating the adulterated glass with colourless, transparent one.

The technique of blowing out the glass includes shaping the glass mass by air pressure acting inside of the portion of it. The characteristics of the material are skillfully used and, at the same time, the acting of certain outside forces applied to the glass portion are exploited. Blowing out is the most universal method of shaping the glass mass and allows to create products in various forms, sizes and predestination.

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Glass versions

Our factory produces glass in three standard, most popular versions:

- transparent glass

- opal triplex glass

- opal triplex matt glass

The division

Depending on the way the light acts, we distinguish between lightning products permeable for, converging, dispersing and dimming the light.

As far as the colour is concerned, there is a division between colourful and colourless glass.

The classification relying on the amount of light let through consists of transparent, clear and unclear glass.

At the moment the division to ordinary (the ones that let light through and protect its source), decorative (the ones that let light through and decorate the lamp) and representative products (the ones that decorate the source of the light in a striking and impressive way) is the most popular one.

We also distinguish between open, half-open and closed products (depending on the lampshade shape) as well as smooth, mat and decorated ones (depending on the type of the surface).

A further classification to lampshades with screw connection, the ones with an opening without the edge, with the flourished edge, with the collar edge and the ones with cylindric edge depends on the way the lampshade is linked to the frame.

As far as the work technique and the tools used are concerned, there are four ways to blow out the products:

  • Manual production
  • Semi-automatic production
  • Ironing
  • Centrifuge production

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Manual production

The manual technique of blowing out the glass products relies upon executing these basic activities:

1. First, by the warmed up tip of the blowpipe, a small amount of glass mass ("a drop") is scooped; then it is rolled on the cast iron plate. Afterwards, an air sac is blown out of it ("a bubble"), followed by coating of the bottom layer of the bubble by the proper portion of the glass mass.

2. After being taken out of the furnace, the glass portion scooped by the blowpipe is rolled on the cast iron plate in order to gain concentricity with the pipe. The portion applied on the bubble is moved to the pitchfork by the trough, where it is properly formed through rolling on a wooden, wet swage. This allows for the portion to acquire its desired shape; then it cools down, but retains the stickiness suitable for the subsequent stages of the production.

3. Once the initial shaping of the glass portion is over, the bubble is blown out by puffing the air through the mouthtip of the blowpipe. 

4. The final shape is created only by blowing out, with the usage of a special form ("forming"). If the product is to have the shape of the rotary solid, the blowpipe is turned by both hands during the blowing, which causes the glass portion to turn inside of the form. Due to this particular practice, the surface of the glass becomes smooth and shiny ("blowing out with turning"). If, however, the shape of the product is not to be a rotary solid and the portion cannot be turned inside of the form, it is blown without being moved ("blowing out silently"). 

5. Once the forming of the product is done and the glass mass is sufficiently solidified, the creation is separated from the tip of the blowpipe by touching the tip with some water. The detached shape is placed on a special table and then, after it is fully solidified, it is moved to unwind. 

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Semi-automatic production

Semi-automatic production involved usage of a certain pneumatic device, which substitutes compressor and vacuum pump for human lungs when blowing out is concerned. This particular machine consists of an iron table, where the pre-form and the ultimate form are placed. Both of the stands are eqiupped with a necessary penumatic installation and with valves, manually regulated by the staff.

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