White zirconia blocks
White zirconia blocks arrive without a shade in the material, and the laboratory adds colour by staining after milling. That approach gives the technician full control over the final shade, because the stain is applied to the milled shape rather than chosen in advance. It also adds a step, and the result depends on the staining routine the laboratory already uses, so a laboratory with a settled staining protocol will usually prefer white blanks for cases where shade control matters most.
White blanks appear in the source catalogue as a category name, and this site keeps them at that level rather than inventing named white products. A buyer who needs a white blank should name the disc size and the staining system in an inquiry, and the company can confirm which white blanks are currently available. The zirconia selection guide compares white blanks with the other two families in more detail.
Pre-shaded zirconia blocks
Pre-shaded zirconia blocks arrive with a shade already in the material, which removes the staining step for standard shades. A laboratory that works mostly in common shades can move faster with pre-shaded blanks, because the milled unit needs less finishing before sintering. The trade-off is a narrower shade choice: a case that falls between two stocked shades still needs staining or a different family, and that judgement belongs to the technician, not to a catalogue page.
Pre-shaded blanks are likewise a category name in the company catalogue. Ask about named products in an inquiry. The comparison page on multilayer versus pre-shaded and white blanks sets out the three families side by side, so a buyer can see the trade-off in one place. Shade availability for a particular case should be confirmed in an inquiry, because stocked shades change more often than catalogue categories do.
Multilayer zirconia blocks
Multilayer zirconia blocks carry a shade gradient inside a single disc, from a more translucent incisal zone to a more chromatic cervical zone, so the milled unit already has a layered appearance before any staining. That gradient is the reason multilayer blanks are popular for anterior work, where a flat single shade looks unnatural. The multilayer family page and the named product pages for 4D Pro and 3D Pro describe the family in those terms, without claiming a measured translucency or strength figure.
The gradient also changes how a laboratory plans a case. The position of the unit inside the disc matters, because the shade at the incisal edge differs from the shade at the margin, and nesting software has to place the design accordingly. A buyer new to multilayer blanks should read the multilayer family page and the selection guide before ordering, and ask about nesting guidance in the inquiry if the laboratory's software is unfamiliar with gradient discs.
Named lines inside the multilayer family
Two named multilayer lines have their own product pages: 4D Pro, listed as 4D Pro Multilayer Zirconia Block and 4D Pro Aesthetics Multilayer Zirconia Block, and 3D Pro, listed as 3D Pro Multilayer Zirconia Block with several MIC title variants for the same family. A third line, the super high translucent 3D multilayer block, appears in the source catalogue as SHT 3D, and this site treats it as part of the same family rather than as a separate product page, because the sources do not give it an independent product page of its own.
All three lines are described in plain language. Ask for the specification table for the exact line in an inquiry. A buyer comparing 4D Pro with 3D Pro should therefore compare the descriptions, note the shade approach each page describes, and then ask the company about the specific shade, size and availability questions that the descriptions leave open.
From blank to finished restoration
A zirconia blank becomes a restoration through milling, sintering and finishing, and each step belongs to a different page on this site. Milling machines shape the blank, sintering furnaces fire it, and burs and glaze paste adjust and finish it. The zirconia sintering guide describes that sequence in general terms. Ask for the sintering curve and temperature for your blank in an inquiry.
The practical consequence is that a laboratory buying blanks should also think about the machines that will process them. A blank that mills well on one machine may need a different bur or a different nesting approach on another, and a furnace cycle that suits one blank family may not suit another. The inquiry form has room to name the blank, the milling machine and the furnace together, so the company can answer the combination rather than the blank alone.
Questions to ask before ordering blanks
Before ordering, a laboratory should confirm the family, the shade approach, the disc size and the quantity range, and then the minimum order quantity, lead time, shipping method and payment terms for that order. Those last four points are written here as buyer instructions, not as company promises, because they depend on the order and the destination. An inquiry that names them will get a quotation that can actually be acted on, rather than a general price list.
Shade questions deserve a separate line in the inquiry, because they are the most common source of a wrong delivery. Name the shade system the laboratory uses, the family chosen, and whether the case needs a gradient or a single shade, and the company can confirm whether the stocked blanks match. A short shade note in the first message saves a return shipment later, and it costs nothing to include.