 Kedok Ketawa was screened as late as August 1944 , but may now be lost . Movies in the Indies were recorded on highly flammable nitrate film , and after a fire destroyed much of Produksi Film Negara 's warehouse in 1952 , old films shot on nitrate were deliberately destroyed . While the American visual anthropologist Karl G. Heider suggests that all Indonesian films from before 1950 are lost , J.B. Kristanto 's Katalog Film Indonesia records several as having survived at Sinematek Indonesia 's archives , and Biran writes that some Japanese propaganda films have survived at the Netherlands Government Information Service . 
 Kedok Ketawa was screened as late as August 1944 , but may now be lost . Movies in the Indies <a href='uninflect' title='1'><mark>were</mark></a> recorded on highly flammable nitrate film , and after a fire destroyed much of Produksi Film Negara <a href='null_genetive' title='2'><mark>'s</mark></a>warehouse in 1952 , old films shot on nitrate <a href='uninflect' title='3'><mark>were</mark></a> deliberately destroyed . While the American visual anthropologist Karl G. Heider <a href='uninflect' title='4'><mark>suggests</mark></a> that all Indonesian films from before 1950 are lost , J.B. Kristanto <a href='null_genetive' title='5'><mark>'s</mark></a>Katalog Film Indonesia <a href='uninflect' title='6'><mark>records</mark></a> several as <a href='been_done' title='7'><mark>having</mark></a> survived at Sinematek Indonesia <a href='null_genetive' title='8'><mark>'s</mark></a>archives , and Biran <a href='uninflect' title='9'><mark>writes</mark></a> that some Japanese propaganda films <a href='been_done' title='10'><mark>have</mark></a> survived at the Netherlands Government Information Service . 
Kedok Ketawa was screened as late as August 1944 , but may now b lost . Movies in the Indies was recorded on highly flammable nitrate film , and after a fire destroyed much of Produksi Film Negara  warehouse in 1952 , old films shot on nitrate was deliberately destroyed . While da American visual anthropologist Karl G. Heider suggest that alll Indonesian films from b4 1950 r lost , J.B. Kristanto  Katalog Film Indonesia record several as done survived at Sinematek Indonesia  archives , and Biran write that sum Japanese propaganda films done survived at the Netherlands Government Information Service .