Blue filters are not included with the Spears & Munsil UHD HDR Benchmark disc because they don’t work with modern displays. You should use blue filter mode on the TV, and if your TV doesn’t have a blue filter mode you should verify the color saturation by viewing the reference montage on the disc.  Read the user guide for instructions regarding modern HDR displays.

Blue Filter Features:

• Not helpful for calibrating modern displays 
  
• Useful for showing how blue filters don't work anymore
• Doesn’t work for HDR calibration
• Not included with the HDR disc because it isn't useful
• No refunds

If you don't own Spears & Munsil (any edition), the replacement filter costs $10 inclusive of international first class mail. 

If you own any copy of Spears & Munsil, you may purchase a single filter for $3.00, inclusive of worldwide first class mail shipping. 

No refunds.