In this work gelatin film was prepared from cow\u27s bone. In order to increase mechanical stability of the prepared transparent film as well as decrease its swelling, glutaraldehyde (GTA) was used. Different mass fractions of GTA were utilized. It was observed that at w = 0.18 % of GTA the load at break of the film is δ= 53.7 N and the solubility decreased. The solubility of the film was measured as a dependant parameter of the swelling behavior. In this case it was decreased from 389 % to 156 % at 5 min for gelatin films without GTA and with 0.18 % GTA, respectively. FTIR spectroscopy results showed a peak for crosslinked gelatin at ΰ = 1650 cm-1. It means the crosslinking between gelatin and GTA has taken place. SEM micrographs confirm the porosity has decreased by increasing the GTA fraction, which is an indication of higher strength.U ovom je radu pripremljen želatinski film od kravlje kosti. Da bi se povećala mehanička stabilnost pripremljenog transparentnog filma kao i smanjilo njegovo bubrenje, upotrijebljen je glutaraldehid (GTA). Upotrijebljeni su različiti maseni udjeli mase GTA. Uočeno je da kod 0,18 % GTA prekidna sila filma iznosi 53,7 N i da se povećala topljivost. Topljivost filma izmjerena je kao parametar ovisan o ponašanju pri bubrenju. U ovom slučaju smanjio se s 389 % na 156 % kod 5 minuta za želatinske filmove bez GTA odn. s 0,18 % GTA. Rezultati spektroskopije FTIR pokazali su maksimum za umreženu želatinu kod 1650 cm-1. To znači da je došlo do umrežavanja između želatine i GTA. Mikroskopske slike SEM potvrđuju da se poroznost smanjila povećanjem dijela GTA, što je pokazatelj veće čvrstoće
