how to cut picture mat board

{"cid":"91225625","title":"A4 Bevel Cut Paper Picture Mats And Art Mount Boards For Sketch Framing","imgUrl":"https:\/\/img.chinax.com\/nimg\/39\/95\/4893a1cb6fa9ac7847b7b9e512b0-200x200-1.jpg","attrs":{"Price":"USD 0.30-1.50 \/ Piece","Brand Name":"8Printing","Model Number":"OEM-Paper-Mat-Board-001","Minimum Order Quantity":"500 pieces","Delivery Time":"10-20 work days","Application":"Sketch Framing, Art Mounting, Photography Display","Certification":"ISO9001, FSC, SGS","Place of Origin":"China","Material":"Heavyweight Specialty Art Cardstock","Color":"White \/ Off-White \/ Custom Colors","Customization":"Full OEM\/ODM Custom Sizing and Window Cutting","Structure":"Single-Layer Rigid Board with 45-Degree Bevel Window","Surface Finish":"Smooth Matte Texture","Payment Terms":"L\/C,T\/T,","Supply Ability":"500,000 pieces \/ Month","Packaging Details":"Standard export cartons with shrink wrap, custom protective packaging available.","Printing Method":"Precision Die-Cutting & Bevel Cutting","Size":"Custom Size Available (A4 Compatible)","Packing Method":"Flat Packed with Protective Cartons","Product Name":"A4 Bevel Cut Paper Picture Mats"}}

{"cid":"91198683","title":"Custom Silicone Rubber EPDM Non Slip Mat With Adhesive Back","imgUrl":"https:\/\/img.chinax.com\/nimg\/f3\/27\/0d7ef0ec92168aea2eb793a51c1e-200x200-1.jpg","attrs":{"Price":"USD, Negotiation","Brand Name":"OEM","Model Number":"OEM","Minimum Order Quantity":"5,000pcs","Delivery Time":"With in 7~15 Days","Certification":"SGS, ROHS,ISO","Place of Origin":"Xiamen, CHINA","Payment Terms":"T\/T, Western Union,Paypal","Supply Ability":"1000,000Pcs\/Month","Packaging Details":"PE + Carton","Material":"Silicone rubber","Color":"Black or custom made","Usage":"cushion","Application":"home appliance,furniture,","Size":"Can be customized","MOQ":"5,000pcs"}}

{"cid":"91154103","title":"Computerized matboard cutter","imgUrl":"https:\/\/img.chinax.com\/nimg\/f3\/f9\/d83182fcfd5e32878ecc5ccd91bf-200x200-1.jpg","attrs":{"Brand Name":"CUTCNC","Model Number":"DCP-X","Delivery Time":"15-25 working days","Place of Origin":"China","Certification":"CE, ISO9001:2008 and others upon request.","Packaging Details":"wooden crate","Payment Terms":"T\/T","Supply Ability":"500set\/year"}}