I'm looking for opinions on Capital Plastics coin display holders. I currently have a US Coin Type Set in the old Brown Dansco album. I'm planning on starting a US classic pre 1933 Gold Type Set as well. Instead of having these "uncertified" coins hidden and locked away in my Lighthouse Quadrum snap-tite binders I'm thinking of putting these in the CP display holders. How sturdy is the construction, opening them and air tightness? Do coins readily tarnish and tone? I've had mixed results with toning in my Dansco albums in our humid environment but I've dramatically updated storage location and regularly run the house AC. Ages ago I thought Capital Plastics went out of business and I didn't see much of their products around but recently they are available on multiple distributors, coin shops and even *m*zon and the *bay auction sites. Thanks for any insight.
I have some gold that has been in Capitol holders for twenty years or better and I haven't noted any toning. Capitol holders are probably the sturdiest around but they aren't air tight. Usually two or three pieces of acrylic that are held together with fasteners once you place your coin....... I would only caution you about displaying high value coins. I had a family member once in dire straights that I would have never dreamed would steal from me but he did. I hate it. I love displaying my coins.
I love Capitol holders but most of the stuff I want to display is in holders. As @Randy Abercrombie said, they are not airtight, but they are attractive and durable.