right. I've got me new SX-70... filled it with film and gone out and took a couple of photos... I've taken the advice of a few sites on the net and waited until the image starts to show before i did owt... then gradually start scribing on the picture with a stick... i've tried doing it with different implements, at different pressures and at different times but i get the same result every time... all that happens is i get either a black line or a white line. I can't get any 'smooshing' of colours and i can't seem to 'bend' any of the picture at all... what's going on? does it need to be warm? also i cant seem to get any of the nicely saturated colours that many manip artists seem to naturally get...?