Method and device for producing a film-shaped test body
A device for producing a film-shaped test body from a solidifiable test substance includes a substrate on which a substance film is formed from test substance applied to the substrate. The device further includes a film-detachment tool having an adhesive surface with which the tool can be placed on the substance film formed on the substrate, the film-detachment tool being shaped so that it leaves a sub-region of the substance film uncovered. The adhesive surface of the film-detachment tool preferably exhibits greater adhesiveness towards a test film that can be created by solidification of the substance film than does the substrate.
1 . A method for producing a film-shaped test body from a solidifiable test substance, wherein
a) the solidifiable test substance is applied to a substrate, so that a substance film is formed on the substrate;
b) a film-detachment tool is placed on the substance film, the film-detachment tool leaving a sub-region of the substance film uncovered;
c) the substance film is solidified to form a test film which adheres to the film-detachment tool;
d) the film-detachment tool, together with the test film adhering thereto, is separated from the substrate; and
e) the film-shaped test body is formed by or from the test film separated from the substrate.
2 . The method according to claim 1 , wherein the film-detachment tool comprises an adhesive surface which faces towards the substance film, which adhesive surface exhibits greater adhesiveness towards the test film than does the substrate.
3 . The method according to claim 1 , wherein the film-detachment tool comprises an adhesive surface which faces towards the substance film, between which adhesive surface and the substance film there is applied an adhesion promoter, so that the adhesiveness between the film-detachment tool and the test film is greater than that between test film and the substrate.
4 . The method according to claim 1 wherein the test body is formed by cutting or punching the test film adhering to the film-detachment tool.
5 . The method according to claim 1 , wherein the test film is separated from the film-detachment tool; and the test body is formed by cutting or punching the test film which has been separated from the film-detachment tool.
6 . The method according to claim 1 , wherein the test film which has been separated from the substrate and is adhering to the film-detachment tool forms the film-shaped test body.
7 . The method according to claim 6 , wherein parts of a measuring device for the test body are used as frame members for the film-detachment tool.
8 . The method according to claim 1 , wherein the test substance is a liquid that is solidifiable by drying, curing or freezing, a suspension containing living cells which forms a cell layer on solidification, or a powder which becomes a continuous solid as a result of a treatment step.
9 . The method according to claim 6 , wherein the film-detachment tool comprises two non-contiguous frame members.