The standard surface roughness value of acrylic sheet is not available in any online links. So please can anyone tell the exact value?
Your starting statement is an odd one to make in light of this information ...
https://www.researchgate.net/publication/230737556_Analysis_of_Surface_Roughness_for_Laser_Cutting_on_Acrylic_Sheets_using_Response_Surface_Method
http://www.engineershandbook.com/Tables/surfaceroughness.htm
http://umpir.ump.edu.my/181/1/Mohd_Arif_Mokti.pdf
https://books.google.com/books?id=QX0Xc9riaPoC&pg=PA403&lpg=PA403&dq=surface+roughness+value+of+acrylic+sheet&source=bl&ots=1X7Ms9m5gq&sig=52qtnrfSXRvpYLW4jREkdAZi_h0&hl=en&sa=X&ved=0ahUKEwjch5Tc9Y7MAhUBLSYKHe-nAmsQ6AEIIjAB#v=onepage&q=surface%20roughness%20value%20of%20acrylic%20sheet&f=false
http://www.academicjournals.org/article/article1380704233_Noor%20et%20al.pdf
Perhaps you want one specific reference value for your particular material. It may not exist. You may need to ask the vendor. Whatever value you do discover, you will need to consider the treatments and the post-treatments of your surface. You may do something different than standard. Even shipping the plastic differently could "scratch" the surface differently. You may therefore never find a value that is "exact" to what you have. You may only find a range of values. Even then, perhaps they will have nothing to do with your surface because you did something else to it.
The best value is always one that you measure over multiple samples.
Conference Paper Analysis of Surface Roughness for Laser Cutting on Acrylic S...
Your starting statement is an odd one to make in light of this information ...
https://www.researchgate.net/publication/230737556_Analysis_of_Surface_Roughness_for_Laser_Cutting_on_Acrylic_Sheets_using_Response_Surface_Method
http://www.engineershandbook.com/Tables/surfaceroughness.htm
http://umpir.ump.edu.my/181/1/Mohd_Arif_Mokti.pdf
https://books.google.com/books?id=QX0Xc9riaPoC&pg=PA403&lpg=PA403&dq=surface+roughness+value+of+acrylic+sheet&source=bl&ots=1X7Ms9m5gq&sig=52qtnrfSXRvpYLW4jREkdAZi_h0&hl=en&sa=X&ved=0ahUKEwjch5Tc9Y7MAhUBLSYKHe-nAmsQ6AEIIjAB#v=onepage&q=surface%20roughness%20value%20of%20acrylic%20sheet&f=false
http://www.academicjournals.org/article/article1380704233_Noor%20et%20al.pdf
Perhaps you want one specific reference value for your particular material. It may not exist. You may need to ask the vendor. Whatever value you do discover, you will need to consider the treatments and the post-treatments of your surface. You may do something different than standard. Even shipping the plastic differently could "scratch" the surface differently. You may therefore never find a value that is "exact" to what you have. You may only find a range of values. Even then, perhaps they will have nothing to do with your surface because you did something else to it.
The best value is always one that you measure over multiple samples.
Conference Paper Analysis of Surface Roughness for Laser Cutting on Acrylic S...
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