| Added by |
 Bart Perdieus
|
| General Description : | Ernest Gaston Joseph Solvay (16 April 1838 – 26 May 1922) was a Belgian chemist, industrialist and philanthropist. In 1861, he developed the ammonia-soda process for the manufacture of soda ash (anhydrous sodium carbonate) from brine (as a source of sodium chloride) and limestone (as a source of calcium carbonate). The process was an improvement over the earlier Leblanc process. He founded the company Solvay & Cie and established his first factory at Couillet (now merged into Charleroi, Belgium) in 1863 and further perfected the process until 1872, when he patented it. Soon, Solvay process plants were established in the United Kingdom, the United States, Germany and Austria. Today, about 70 Solvay process plants are still operational worldwide. |
| Face value | 20 + 5 Centimes |
| Catalog code (Michel) | BE 1022 |
| Catalog code | Stamp Number BE B573 Yvert et Tellier BE 973 Stanley Gibbons BE 1561 AFA number BE 1039 Belgium BE 973 Unificato BE 973 |
| Stamp colour | sepia |
| Stamp use | Semi Postal stamp |
| Print run | 609.380 |
| Issue date | 10/09/1955 |
| Designer | Jean Van Noten |
| Print technique | photogravure |
| Perforation | 11 1/2 |
| Height | 28.00 mm |
| Width | 39.00 mm |
| Catalog prices | No catalog prices set yet |
