In the heyday of Anthracite mining in Pennsylvania, many of the coal companies branded their coal. This was done as a sales gimmick. One of the most famous branded coals was the Glen Alden Coal Company's "Blue Coal" . Often the coal was dyed a color other than black. This dye also served as a lubricant to allow the coal to travel down chutes and bins more easily. When the coal traveled more smoothly, it was less likely to break into smaller pieces. Catchy slogans came with the brand names.
Blue Coal - dyed a blue color "Clean, Safe, Low Cost Heat"
Sterling Brand Coal - dyed a silver color "Triple-Tested" and "Chemi-Coated' Gold Nugget Coal - dyed a gold color Orange Coal - dyed orange
Pittston Coal - used this name as a sales gimmick Jet-Black Anthracite - used the name and black color as gimmick and to imply purity
Reading Anthracite with "Red Spots Bright" - coal was flecked with red dye Red Coal - dyed red "If it's Red it's Reading ..."
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