I inserted about 40 small logo artworks into my 2D drawing, the file size then jumped from 9Mb to 25Mb. Most of the logos are black and white, a couple are colour. And most are copies of each other, there are only about 15 different logos. I know there are many methods to add these to my drawing and also many source types: Logo file type, logo filesize, image resolution, copy and paste, insert picture etc. Rather than trying all possible permutations, does anyone know the best way to add these logos to my drawing without increasing the drawing filesize too much?

TIA

Maurice