His company, which was simply known as L. P. Holmblad, had activities in dyes, soap, glue and playing cards.

Holmblad was also part of the circle around Carl Frederik Tietgen, co-founding several of his companies.

His great-grandfather, Jacob Holmblad, a Swedish dyer who emigrated to Denmark in about 1766, introduced new production methods at the Royal Textile Factory where he used Rubia plants to produce the red dye for the Royal Life Guards' gala uniforms.

The enterprise was later taken over by his son, Lauridz Holmblad, who also founded a soap factory in 1805 and started Denmark's first real production of paint in 1819.

Jacob Holmblad's soap factory on the corner of Gothersgade and Regnegade also comprised productions of both lacquer and playing cards.

[2] In 1862, he was elected to Privatbanken's bank council, where he remained a loyal supporter of Carl Frederik Tietgen until his death.

From 1876 he was chairman of the association behind the construction of Kunstnerhjemmet which provided affordable housing and studio facilities for artists.

In Amager, where most of his companies were gradually concentrated, he was a great supporter of the poor as well as the construction of both schools and churches.

After L. P. Holmblad's death, his company continued to exist under the leadership of first his son and then his grandson until 1919, when it was merged into O.F.

It was part of a larger merger, Medicinalco, which also included three other companies: Gustav Lotze, Th.