This advertising poster for OTTA soap, featuring the lobster motif, was designed by Leo Heilbrunn (LH)—one of the most important professional Czech commercial graphic designers of the interwar period. Occasionally, posters arrive in my studio that are almost mint. In this case, the only real flaw was the presence of fold lines. To stabilize the sheet and eliminate the folds, I carried out a linen backing treatment. The result is a poster that is clean, flat, and structurally sound—ready to be enjoyed and safely displayed.