If they are curved and horizontal, then they will create bright dots of light which float in the region behind the scratches. To make holograms that float in front of the scratches instead of behind, just turn the scratches upside-down. Make them bowl-shaped, humping down in the middle, rather than rainbow shaped and humping upwards. The bright dots of light will float in space in front of the plastic plate. You could also make a normal scratch hologram, then turn it upside-down.
All holograms create pseudoscopic images when illuminated and viewed from reversed angles.
The pattern looks like millions of concentric circles. Because it is made from closely-spaced lines, it is an interference pattern. A conventional hologram is composed of millions of overlapped Gabor Zoneplates. With Benton's One-step Whitelight Holograms, the image of the object is passed through a lens and focussed upon the holographic film. A black plate covers this lens, and the plate has a narrow horizontal slot in it.