In Finland, window glass was blown until the 1930s. The thickness of these glass panes was about 1.5 mils. For a long 19th century, glass was made only from domestic raw materials and because of that, the glass was greenish due to impurities in the sand.
The brinks are also interesting. Fiskars Village, has two two prominent buildings on the riverbank, each with a striking red-and-black brick exterior. The mill and granary, built in 1898 and 1902, respectively, were constructed from a combination of traditional red bricks and unique black bricks. The secret ingredient of these black bricks was slag, a smelting byproduct created by the blast furnaces of the ironworks.