[2] In 1937, Lohse co-founded Allianz, an association of Swiss modern artists, with Leo Leuppi.
In 1938, he helped Irmgard Burchard, to whom he was married for a brief time, to organise the London exhibition "Twentieth Century German Art".
His political convictions then led him into the resistance movement, where he met his future wife Ida Alis Dürner.
The year 1943 marked a breakthrough in Lohse's painting: he standardised the pictorial means and started to develop modular and serial systems.
[3] Lohse's typical classic paintings are nonrepresentational, systematic, two-dimensional laminar planes of interacting colour elements in various logical/mathematical relations visible to the eye, using the structure of colour that we perceive, and in a way that every element plays an equal qualitative role.