In the traditional offset printing process, the fountain solution functions to separate the graphic area from the non-graphic area, that is, to prevent the ink from being transferred to the non-graphic area of ​​the printing plate. The main component of fountain solution is water. Experience shows that in traditional offset printing, the pH of fountain solution is between 4.8 and 5.5, and the hardness of water should be 8-12. dH. In addition to water, the fountain solution usually contains a plate protectant, a wetting agent, isopropyl alcohol (IPA), a buffer, an antibacterial agent, and the like.
Gum arabic is a printing plate protectant. Wetting agents and isopropyl alcohol are used to reduce the surface tension. The role of the buffer is to stabilize the pH of the fountain solution.
If more than one offset printing press is used to prepare the fountain solution on a central additive metering device, an antibacterial agent must also be added. Otherwise, algae that grows can clog the straw. In addition, the alcohol-free fountain solution also contains alcohol substitutes such as ethylene glycol instead of isopropyl alcohol.
Source: 21st Century Fine Chemicals Network
Height Adjustable Laptop Stand
Adaptable design can be used as a desk for your laptop or for speaking engagements. Travel all around the house or take with you on the road. The small frame makes working on your sofa or bed feasible.
Sit-to-Stand Rolling Laptop Cart saves space while providing the laptop or writing setup you need.
PRODUCT HIGHLIGHTS
1.Adjustable overbed bedside tablet: You can easily adjust the table at any angle or height you want and locks firmly in position.So that the rolling Laptop Desk tilting Overbed Table can provide you a more comfortable position.
2.Safety rolling Computer Desk:The rolling bedside table can safely hold your laptop with safety edge stopper.
3.Mobile computer desk:The mobile laptop desk with wheels to move around or lock in your convinience.It is easy to drive overbed table with wheels to any room freely.
4.Versatile use:You can use it as tiltable bedside table, laptop rolling cart,TV trays for bed,over bed table with wheels.Professional design,single pole under steel frame,you can freely stretch legs of the overbed laptop table on wheels.
5.Top quality material for safe using:E1 grade table top which is water proof,welded metal base frame provides you with sturdy rolling tray table.
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