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0826 Question

1. How does Ink Made

Componenets

  • Water
  • Dye or Pigment: provide color
  • dye is soluble in water
  • Pigment are solid
  • Surfactants: keep dye or pigment dispersed uniformly 表面活性剂
  • Humectants: 保湿剂
  • Preservative: 防腐剂
  • pH Modifiers

1.1. Surfactants

Reduce the surface tension of liquid

Result of the constant random movement of water

2. Why SD not TF

  • History: SD 1998, MicroSD 2005
  • Durability: larger, easier to handle
  • Write Speed: faster write speed
  • Camera don’t need to be too small

3. Cat Colors

  • Genetics
  • color gene
  • White spotting
  • Agouti
  • Dilution gene
  • Environment
  • Temperature-sensitive

3.1. Why so many gene?

  • Evolutionary advantage
  • Mutation
  • Human Selection
  • Redundancy act as a safeguard

4. Backup Strategy

3-2-1 Principle

  • 3 total copies
  • 2 of them are local
  • 1 off-site backup

Right backup medium

  • External Hard Drive
  • NAS
  • Cloud Storage