In particular, on the subject of the handwriting, Roger Viklund in collaboration with Timo S. Paananen has demonstrated that "all the signs of forgery Carlson unearthed in his analysis of the handwriting", such as a "forger's tremor", are only visible in the images Carlson used for his handwriting analysis. Carlson chose "to use the halftone reproductions found in book "Clement of Alexandria and a Secret Gospel of Mark"" where the images were printed with a line screen made of dots. If the "images are magnified to the degree necessary for forensic document examination" the dot matrix will be visible and the letters "will not appear smooth". Once the printed images Carlson used are replaced with the original photographs, also the signs of tremors disappear.