Stained glass sheets are very fragile - they recquire gentle and knowledgeable approach.
"Antique" stained glass sheets are made by blowing a cylinder of molten glass. Then, the cylinder is cut along its side and flattened. As the result we get a glass sheet with quite uneven surface - their thickness varies from 2,5mm to 4,0mm. It's not a defect. Contrary, it gives some unique aesthetic values. The colours fade and gather intensity depending of the thickness of the glass. This type of glass can be colored by coating process in which the transparent glass sheet is covered with a fine layer of colour. Glass produced in this technique is a splendid work of art itself.
Unfortunatelly, the uniqueness and luxury of this material is reflected in its high prize. 1 sq. m. costs 200 € (netto prize excluding transportation from Germany).
So, as you might guess, shipping glass sheets is quite a logistic challenge. Glashütte Lamberts in Waldsassen, our main supplier definately brougt to perfection the art of packaging. Their glass container is a soilid wooden crate reinforced with perpendicular crossbars preventing from falling over. The crate is insulated with styrofoam panels and polyurethane foam. Between each glass panel there is a sheet of cardboard. The basic issue is preventing glass from sliding and bumping inside the box. All the glass must be stiffly but no too tighltly (!) packed. Thanks to the insulation space between the glass sheet and the crate, the external shock is not a danger. On the picture you can see a perfect example of packaging - a parcel with stained glass sheets from Glashütte Lamberts.
No wonder they arrived flawless!