Alternative processes do not need to be used to produce photograms. Man Ray and other famous photographer-artists used this simple method.
Simply use normal photographic enlarging paper, exposed under an enlarger WITHOUT A NEGATIVE in the carrier. Place objects on the paper, expose and develop normally.Cut glass from second hand stores, grain, salt crystals. A lot of semi transparent things work great. Also check out leaves, especially ones that have partially rotted to expose vein structures. Keep you eyes open, that is a lot out there.