After a relative stable period, with crude and some other materials at stable supply/demand balance and low cost levels, many raw material costs have suddenly started to move up significantly.   “When in mid-December last year we looked at our raw material forecasts for 2017, we anticipated relatively small upward cost pressures,” said Jan Paul van der Velde, SVP procurement, IT and regulatory of Flint Group. “Now about two months later, we look at a completely different picture. Since the OPE...