By adopting a sedentary way of life, the Neolithic groups increased their awareness of territoriality. During the 9600-6900 BCE period in the Near East, there were also innovations in arrowheads, yet no important changes in the animals hunted was detected.
3. Poor screen preparation is a major cause of pinholes. Particles of dirt, wood frame chips, and dust remaining on the fabric during coating will be trapped in the emulsion. Opaque, they will block light from hardening the emulsion beneath them, so that the emulsion in these small areas will wash away after exposure.
There are hydrogen pinholes and hydrogen-nitrogen pinholes, which cannot be distinguished from each other, and CO-slag reaction pinholes. Known possible root causes of this defect include specific properties of the iron on the one hand and specific properties of the mold material system on the other hand.