Tyvek paper will tolerate full immersion in water for several years without breakdown. White, non-toxic, chemically inert and recyclable. It is manufactured from finely spun polyethylene fibres which are then compressed to form the paper. A4 size, available in standard 55gm or heavy 75 gm.SeaWriter pencils are not suitable for writing on Tyvek.hite, non-toxic, chemically inert and recyclable. It is manufactured from finely spun polyethylene fibres which are then compressed to form the paper. A4 size, available in standard 55gm or heavy 75 gm. SeaWriter pencils are not suitable for writing on Tyvek.
The Medieval Ages, or the Middle Ages, is divided into three main parts as Early Middle Ages, High Middle Ages, and Late Middle Ages. Dark Ages is the Early Middle Ages, which is fixed roughly to be from 400 AD to 1000 AD by historians. The term, Dark Ages, was first coined by the Italian scholar Francesco Petrarca who was otherwise called Petrarch. It is interesting to note that there was religious struggle during the period of Dark Ages.
The Greek Dark Age chronology does not have any single fixed point, which means that, since literacy was lost, we do not have any historical event that could be linked to world chronology. Some scholars have proposed a date between c. 1200 BCE and c. 800 BCE for the Greek Dark Age.Others believe that it begins in c. 1100 BCE and ends in 776 BCE, the date of the first Olympian Games (according to Hippias of Elis).A date between c. 1000 and 750 BCE has also been favoured.ome scholars have proposed a date between c. 1200 BCE and c. 800 BCE for the Greek Dark Age. Others believe that it begins in c. 1100 BCE and ends in 776 BCE, the date of the first Olympian Games (according to Hippias of Elis). A date between c. 1000 and 750 BCE has also been favoured.