![reduce card stock crack reduce card stock crack](https://images-na.ssl-images-amazon.com/images/I/415xHChQVIL._SX342_.jpg)
The environment, especially with regard to the paper's moisture content, makes a difference in whether paper will crack.Heat applied to rapidly dry the printed sheet as it exits the press affects the humidity content of the sheet, further reducing flexibility. The printing process makes the paper less flexible with the addition of countless combinations of inks, varnishes and coatings.
#REDUCE CARD STOCK CRACK FULL#
But coated papers tend to reproduce originals better than uncoated sheets which is why you see more full color jobs printed on coated sheets. No sheet is immune to cracking, but since the coated sheet is more complex than the uncoated it's more prone to fiber cracking. Heavy coatings and low fiber content means less stability and a greater tendency to crack. The paper structure varies with coating thickness, fiber content, length of fibers, bond between base and coating and how pulp is treated.Second, we'll see how creasing works and why it is an important solution. Some printed papers will fold just fine (usually text weight stocks and lightweight covers folding with the grain.) It is on jobs where fiber cracking or splitting occurs that creasing becomes important.Ģ Strategies to Handle the Fiber Cracking Problemįirst, let's look at 3 factors that affect the paper. Many jobs need to be folded after printing, and customers won't tolerate a finished, folded piece that's marred by any ‘cracking' or splitting of the sheet. The Office of Rail and Road is the independent economic and safety regulator for Britain’s railways, and monitor of performance and effciency for England’s Strategic Road Network.The goal of the designer and printer is to reproduce a job as close to the original as possible, in any quantity.ORR’s review is ongoing and we continue to work closely with all parties, including Hitachi Rail, Great Western Railway (GWR), London North Eastern Railway (LNER), Hull Trains, Transpennine Express (TPE) and ScotRail to ensure that lessons are learnt from the discovery of cracks in Hitachi AT200 (Class 385) & AT300 (Classes 800, 801 and 802) rolling stock.In June, ORR published a passenger impact review which found operators were still able to provide clear and consistent information to passengers during the disruption.
![reduce card stock crack reduce card stock crack](https://www.everybuckcounts.com/wp-content/uploads/2018/07/shutterstock_495885250.jpg)
#REDUCE CARD STOCK CRACK CRACK#
This means that over time the crack grows and reduces the strength of the component until the remaining uncracked material is not strong enough to take the loads being imparted. Fatigue - For fatigue to occur the loads must be above a threshold level but are typically much lower than the load required to cause an immediate structural failure of the material.In the case of SCC the three elements are: the susceptible material the specific corrosive substance to which the material is susceptible and mechanical stress in the material. It has been likened to the fire triangle where fuel, heat and oxygen must all be present for combustion to take place if any of the three elements is missing then there is no fire. Stress corrosion cracking - Stress corrosion cracking is where cracks develop in susceptible materials when they are exposed to a specific corrosive substance while subject to stress.HM Chief Inspector of Railways at ORR Ian Prosser CBE said: ORR continues to work with Hitachi and the industry and expects to publish a final report in December 2021. The regulator’s interim report finds that since being put back into service, trains have performed as specified, with no unsafe conditions or harm arising from the cracking. ORR’s report found that once the cracks were identified, the industry worked collaboratively to swiftly withdraw the trains and then to establish a suitable process for assessing which trains were able to return to service. Stress corrosion cracking occurs when susceptible materials are exposed to a specific corrosive substance while subject to stress. The regulator also commends the rapid industry response and subsequent work to safely reintroduce trains to service.Ĭracks found in the area of the bolster close to the yaw damper bracket and anti-roll bar fixing points were a result of fatigue, and cracks found in the area where the lifting plates attach to the vehicle body were the result of stress corrosion cracking.