Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,403 pages of information and 233,519 images on early companies, their products and the people who designed and built them.
37/41 Gracechurch Street, London (1926)
1923 - Formed to produce alginates from seaweed.
1927 - F C Thornley moved to San Diego to set up Thornley and Co.
1929 - The company became Kelp Products Corporation.
Eventually became Kelco Co.
In the 1920s they appear to be the first to produce pure calcium alginate as a commercial product.