FAQ

• Q81:

  Which Film Provides a Darker Off-State?

  

  A:

  Black DLC. Its lower off-state VLT is better suited to projects that want a deeper dark appearance and greater reduction of incoming visible light when the film is off.

  
  

• Q82:

  Why Is the VLT Change Smaller with Black PDLC?

  

  A:

  The added black window film provides a fixed tint in both electrical states. The PDLC layer can switch between frosted and clear, but the black tint remains, limiting the overall change in VLT.

  
  

• Q83:

  Which Film Lets in More Light When Powered On?

  

  A:

  Black DLC has a higher on-state VLT than Black PDLC. The black window film on both sides of Black PDLC continues to reduce light transmission even when its PDLC layer is clear.

  
  

• Q84:

  Are Both Films Dark When Powered Off?

  

  A:

  Yes. Both appear dark and obscure the view when power is off. Black DLC has a lower off-state VLT, allowing less visible light through in its dark state.

  
  

• Q85:

  What Is the Main Difference Between Black PDLC and Black DLC Film?

  

  A:

  Black PDLC is made by applying black window film to both sides of white PDLC film. Black DLC uses dye liquid crystal technology to create its dark state. This difference in construction gives Black DLC a wider visible light transmission (VLT) range in InnoGlass’s product lineup.

  
  

• Q86:

  How Should I Choose Between PNLC and PDLC?

  

  A:

  Start with one question: What should the glass look like when power is off? Choose PNLC for a clear default or PDLC for a frosted default. Then confirm the film’s optical performance, electrical requirements and glass construction for your project.

  
  

• Q87:

  Where Is PNLC a Better Fit Than PDLC?

  

  A:

  PNLC suits glass that should normally remain transparent, with privacy activated only when needed—for example, a meeting room partition that is usually left open to view. PDLC suits spaces where frosted privacy is the preferred default.

  
  

• Q88:

  Are PNLC and PDLC Suitable for Solar Control?

  

  A:

  Both primarily switch between clear and frosted views. A frosted appearance does not by itself indicate strong solar heat reduction. If controlling sunlight and heat is the main goal, compare measured performance for the complete glazing system.

  
  

• Q89:

  Can PNLC and PDLC Both Be Used for Projection?

  

  A:

  Their frosted states may be used as projection surfaces, subject to the film specification and room lighting. The key planning difference is that PNLC must be powered for its frosted state, while PDLC is frosted without power.

  
  

• Q90:

  Does PNLC Provide the Same Level of Privacy as PDLC?

  

  A:

  Not exactly. Both films obscure the view in their frosted state, but PNLC generally provides slightly less visual concealment than PDLC. If stronger privacy is the priority, PDLC is usually the better choice. For either film, we recommend testing a sample under the project’s actual lighting and viewing conditions.