You should avoid lamination as it could be counterproductive and result in speeding up the degradation process.
The best and safest way to save a wallet seed or a private key is to engrave it on a metal plate. It might be a bit more expensive, though.
If using papers is your only option then make few copies and store them in different places and check them regularely.
Store your bitcoin seed / private key safely (Water, Fire, Shock-proof)Lamination is better than write key down on paper sheet but you are totally right that lamination is expensive and it does not permanently exist. Metal plates are better than lamination but the cost is expensive too and they even can not 100% protect your seed or keys. Who can find anything can 100% survive through any kind of disaster or catastrophe.
Paper, lamination, metal plates, USB, harddrive, etc, any tool is used store your private key/ seed backups need to be put into another safe protective device such as Vaults. Vaults in turn need to be placed in as safest locations as possible.
Double or tripple protections for your private keys/ seeds.