In Vitros Slide

• Vitros dry slide

  A) upper slide mount

  B) lower slide mount

  C) support

  D) indicator layer

  E) semipermeable membrane

  F) reagent layer

  G) spreading layer

  
• Upper and lower slide mounts are hard plastic
• Spreading layer - what sample is dropped on to; in charge of spreading sample over entire square
• Reagent layer - whatever reagents are required for that reaction in exactly the right ratios and amounts
• Semipermeable membrane - filtering out any unwanted analytes that may interfere with color development
• Indicator layer - layer that changes color 
• Support layer - piece of crystal clear plastic; shiny and reflective