Editing Pressure cooker (section)

=== Materials ===
[[File:Aluminum pressure cooker kazan from Afghanistan.jpg|thumb|Aluminum Afghani pressure cooker ([[Kazan (cookware)|kazan]]), similar to those found to contain high levels of lead.]]

Pressure cookers are typically made of [[aluminum]] (aluminium) or [[stainless steel]]. Aluminum pressure cookers may be [[Stamping (metalworking)|stamped]], [[Polishing (metalworking)|polished]], or [[Anodizing|anodized]], but all are unsuitable for the [[dishwasher]]. They are cheaper, but the aluminum is reactive to acidic foods,<ref>{{Cite web |title=Aluminum {{!}} Public Health Statement {{!}} ATSDR |url=https://wwwn.cdc.gov/TSP/PHS/PHS.aspx?phsid=1076&toxid=34 |access-date=2024-08-19 |website=wwwn.cdc.gov |quote=Eating large amounts of processed food containing aluminum additives or frequently cooking acidic foods in aluminum pots may expose a person to higher levels of aluminum than a person who generally consumes unprocessed foods and uses pots made of other materials (e.g., stainless steel or glass). However, aluminum levels found in processed foods and foods cooked in aluminum pots are generally considered to be safe.}}</ref> whose flavors are changed in the reactions,{{citation needed|date=September 2022}} and are less durable than stainless steel pressure cookers. Some [[Kazan (cookware)|aluminum pressure cookers]] from Afghanistan are known to be contaminated with lead and imported pots were responsible for the lead poisoning of Afghani refugees in [[Washington (state)|Washington state]] in 2019.<ref name=":3">{{cite web | title=Public Health Advisory Related to Aluminum Afghan Kazan Pressure Cookers | website=Boston.gov | date=16 May 2023 | url=https://www.boston.gov/news/public-health-advisory-related-aluminum-afghan-kazan-pressure-cookers | ref={{sfnref | Boston.gov | 2023}} | access-date=18 August 2024}}</ref><ref name=":2">{{Cite journal |last1=Fellows |first1=Katie M. |last2=Samy |first2=Shar |last3=Rodriguez |first3=Yoni |last4=Whittaker |first4=Stephen G. |date=May 2022 |title=Investigating aluminum cookpots as a source of lead exposure in Afghan refugee children resettled in the United States |journal=Journal of Exposure Science & Environmental Epidemiology |language=en |volume=32 |issue=3 |pages=451–460 |doi=10.1038/s41370-022-00431-y |pmid=35501355 |issn=1559-064X|pmc=9119854 }}</ref><ref>{{Cite journal |last1=Fellows |first1=Katie M. |last2=Samy |first2=Shar |last3=Whittaker |first3=Stephen G. |date=2024-05-21 |title=Evaluating metal cookware as a source of lead exposure |url=https://www.nature.com/articles/s41370-024-00686-7?fromPaywallRec=false |journal=Journal of Exposure Science & Environmental Epidemiology |language=en |pages=1–9 |doi=10.1038/s41370-024-00686-7 |issn=1559-064X|doi-access=free |pmc=12069085 }}</ref>

Higher-quality stainless steel pressure cookers are made with heavy, three-layer, or [[Copper-clad steel|copper-clad]] bottoms ([[heat spreader]]) for uniform heating because stainless steel has lower [[thermal conductivity]]. Most modern stainless steel cookers are dishwasher safe, although some manufacturers may recommend washing by hand. Some pressure cookers have a [[Non-stick surface|non-stick]] interior.