Glass measure
The size of the glass was a very different measure in the production of glass and mirror manufacture and quite diverse. Almost every glassworks had its own measuring systems. With dimensions for sheet and mirror glass, one limited oneself to the dimensions and separately often as piece dimensions in the dispatch of the finished products.
Germany
To determine the size of the panels, the inch was used in its variety for width and length. In Germany the key was the twelve inch imperial foot .
- 1 inch = 23.833 millimeters
- 12 inches = 286 millimeters
In the Thuringian huts and partly in Bohemia , for example, the tables were divided into four, ordinary, tall and long . The tables sometimes went up to glass number 12, but also up to 30 and 40 in various companies. French, English and German window glass, drinking glasses and other glasses were sold more after boxes. The boxes were of different sizes. After Ballen, a special glass measure, the glass panels were also occasionally sold.
In the glass trade there was a basket or glass basket (French: Panier de verre). Not only the basket in which these goods were carried, but also the goods themselves were given this name. Other dimensions were shock and dozen in the glass trade . After that, for example, sold the drinking glasses, bottles of and bottles. The medicine and laboratory glasses were traded according to the straw , another glass measure.
The Bohemian plate glass came into the store in large, straw-lined boxes. It was divided into bundles. The bundle contained from 1 to 60 pieces , which fluctuated according to the prescribed amount. Usually the smallest panels were 22 inches long and 18 wide, and the largest 31 inches long and 28 wide.
In Brandenburg the box of sheet glass contained 20 bundles and one bundle contained 6 tablets. The board was 20 inches long and 16 wide, including the edge.
At the two glassworks in the Zechlin and Tornow offices in Churmark , where white chalk glass was made, this glass was sold after shock. One shock contained 1 to 8 tablets that were these dimensions (length and width) in inches.
- 1 board with 31 by 29 inches
- 2 boards with 31 by 27 inches
- 3 panels measuring 29 by 26 inches
- 4 panels measuring 28 by 25 inches
- 5 panels measuring 26 by 21 inches
- 6 panels with 23 by 21 inches
- 7 panels measuring 22 by 19 inches
- 7 panels measuring 22 by 18 inches
- 8 panels measuring 19 by 18 inches
Source:
France
Not so in French glassworks. There was the addition system here. This addition system was used in many glassworks. The values of the length and width of the table glass were added and had the so-called glass number. Example for a board measuring 18 by 21 inches resulted in: 18 plus 21 equals 39, as the glass number 39. The price of the goods rose as the number increased.
Bohemia
- Table as an example for Bohemian glass (data in inches) extract.
| Glass number | Square table | Height table |
|---|---|---|
| Length times width | Length times width | |
| 1 | 35 times 30 | 36 by 37 |
| 2 | 33 by 27 | 34 times 26 |
| 6th | 25 times 22 | 27 times 20 |
| 12 | 13 times 14 | 13 times 12 |
The Bohemian glass held its price despite the different table sizes, as it was calculated according to boxes. It was the so-called box glass , which, due to the additives (soda glass), tended to bleach and discolour when it was melted. Bohemian plate glass, also traded as this from Thuringia, was only sold packaged. The jar numbers, ranging up to 12, were divided into two groups, the square tables and height tables, and the panel dimensions were in inches. The sale happened after Schock or Bunde with up to 30 bars. If there were eight panels on a bundle, it was an eight.
Crate glass: 1 box with 20 containers of 6 bars (20 by 16 inches) = 120 bars
See also
literature
- B. Harres: The School of Architecture: a handbook for architects, construction and trade schools, as well as for self-teaching for builders and building contractors. Volume 4, Verlag Otto Spamer, Leipzig 1868, p. 86.
Individual evidence
- ↑ Economic Encyclopedia. (1773-1858) by JG Krünitz, p. 672.